甲、乙、丙、丁四位同学打算各写一篇关于明代政治制度的论文，他们采用了不同的研究方法，其中步骤比较合理，论证比较严谨的是<table style="border: currentColor; border-collapse: collapse; mso-table-layout-alt: fixed; mso-border-left-alt: 1.5000pt solid windowtext; mso-border-top-alt: 1.5000pt solid windowtext; mso-border-right-alt: 1.5000pt solid windowtext; mso-border-bottom-alt: 1.5000pt solid windowtext; mso-border-insideh: 0.7500pt solid windowtext; mso-border-insidev: 0.7500pt solid windowtext; mso-padding-alt: 0.0000pt 5.4000pt 0.0000pt 5.4000pt;" border="1" cellspacing="0" _dj="MsoNormalTable"><tbody><tr style="height: 19.6pt;"><td style="border-width: 1.5pt 1pt 1pt 1.5pt; border-style: solid; border-color: windowtext; padding: 0pt 5.4pt; width: 19.65pt; mso-border-left-alt: 1.5000pt solid windowtext; mso-border-top-alt: 1.5000pt solid windowtext; mso-border-right-alt: 0.7500pt solid windowtext; mso-border-bottom-alt: 0.7500pt solid windowtext;" valign="center" width="26"></td><td style="border-width: 1.5pt 1pt 1pt; border-style: solid; border-color: windowtext; padding: 0pt 5.4pt; width: 166.45pt; mso-border-left-alt: 0.7500pt solid windowtext; mso-border-top-alt: 1.5000pt solid windowtext; mso-border-right-alt: 0.7500pt solid windowtext; mso-border-bottom-alt: 0.7500pt solid windowtext;" valign="center" width="221">第一步</td><td style="border-width: 1.5pt 1.5pt 1pt 1pt; border-style: solid; border-color: windowtext; padding: 0pt 5.4pt; width: 149.05pt; mso-border-left-alt: 0.7500pt solid windowtext; mso-border-top-alt: 1.5000pt solid windowtext; mso-border-right-alt: 1.5000pt solid windowtext; mso-border-bottom-alt: 0.7500pt solid windowtext;" valign="center" width="198">第二步</td></tr><tr style="height: 19.6pt;"><td style="border-width: 1pt 1pt 1pt 1.5pt; border-style: solid; border-color: windowtext; padding: 0pt 5.4pt; width: 19.65pt; mso-border-left-alt: 1.5000pt solid windowtext; mso-border-top-alt: 0.7500pt solid windowtext; mso-border-right-alt: 0.7500pt solid windowtext; mso-border-bottom-alt: 0.7500pt solid windowtext;" valign="center" width="26">甲</td><td style="padding: 0pt 5.4pt; border: 1pt solid windowtext; width: 166.45pt; mso-border-left-alt: 0.7500pt solid windowtext; mso-border-top-alt: 0.7500pt solid windowtext; mso-border-right-alt: 0.7500pt solid windowtext; mso-border-bottom-alt: 0.7500pt solid windowtext;" valign="center" width="221">提出明代君主专制空前加强的观点</td><td style="border-width: 1pt 1.5pt 1pt 1pt; border-style: solid; border-color: windowtext; padding: 0pt 5.4pt; width: 149.05pt; mso-border-left-alt: 0.7500pt solid windowtext; mso-border-top-alt: 0.7500pt solid windowtext; mso-border-right-alt: 1.5000pt solid windowtext; mso-border-bottom-alt: 0.7500pt solid windowtext;" valign="center" width="198">找到明太祖颁布的几道圣旨作证据</td></tr><tr style="height: 19.6pt;"><td style="border-width: 1pt 1pt 1pt 1.5pt; border-style: solid; border-color: windowtext; padding: 0pt 5.4pt; width: 19.65pt; mso-border-left-alt: 1.5000pt solid windowtext; mso-border-top-alt: 0.7500pt solid windowtext; mso-border-right-alt: 0.7500pt solid windowtext; mso-border-bottom-alt: 0.7500pt solid windowtext;" valign="center" width="26">乙</td><td style="padding: 0pt 5.4pt; border: 1pt solid windowtext; width: 166.45pt; mso-border-left-alt: 0.7500pt solid windowtext; mso-border-top-alt: 0.7500pt solid windowtext; mso-border-right-alt: 0.7500pt solid windowtext; mso-border-bottom-alt: 0.7500pt solid windowtext;" valign="center" width="221">提出皇权有所限制的观点</td><td style="border-width: 1pt 1.5pt 1pt 1pt; border-style: solid; border-color: windowtext; padding: 0pt 5.4pt; width: 149.05pt; mso-border-left-alt: 0.7500pt solid windowtext; mso-border-top-alt: 0.7500pt solid windowtext; mso-border-right-alt: 1.5000pt solid windowtext; mso-border-bottom-alt: 0.7500pt solid windowtext;" valign="center" width="198">找到张居正的相关政治活动作证据</td></tr><tr style="height: 19.6pt;"><td style="border-width: 1pt 1pt 1pt 1.5pt; border-style: solid; border-color: windowtext; padding: 0pt 5.4pt; width: 19.65pt; mso-border-left-alt: 1.5000pt solid windowtext; mso-border-top-alt: 0.7500pt solid windowtext; mso-border-right-alt: 0.7500pt solid windowtext; mso-border-bottom-alt: 0.7500pt solid windowtext;" valign="center" width="26">丙</td><td style="padding: 0pt 5.4pt; border: 1pt solid windowtext; width: 166.45pt; mso-border-left-alt: 0.7500pt solid windowtext; mso-border-top-alt: 0.7500pt solid windowtext; mso-border-right-alt: 0.7500pt solid windowtext; mso-border-bottom-alt: 0.7500pt solid windowtext;" valign="center" width="221">查阅到明太祖封了辽、宁，燕、谷、代、晋、秦、庆、肃等九王的相关史料</td><td style="border-width: 1pt 1.5pt 1pt 1pt; border-style: solid; border-color: windowtext; padding: 0pt 5.4pt; width: 149.05pt; mso-border-left-alt: 0.7500pt solid windowtext; mso-border-top-alt: 0.7500pt solid windowtext; mso-border-right-alt: 1.5000pt solid windowtext; mso-border-bottom-alt: 0.7500pt solid windowtext;" valign="center" width="198">得出分封制在明朝仍然以一定形式存在的结论</td></tr><tr style="height: 19.6pt;"><td style="border-width: 1pt 1pt 1.5pt 1.5pt; border-style: solid; border-color: windowtext; padding: 0pt 5.4pt; width: 19.65pt; mso-border-left-alt: 1.5000pt solid windowtext; mso-border-top-alt: 0.7500pt solid windowtext; mso-border-right-alt: 0.7500pt solid windowtext; mso-border-bottom-alt: 1.5000pt solid windowtext;" valign="center" width="26">丁</td><td style="border-width: 1pt 1pt 1.5pt; border-style: solid; border-color: windowtext; padding: 0pt 5.4pt; width: 166.45pt; mso-border-left-alt: 0.7500pt solid windowtext; mso-border-top-alt: 0.7500pt solid windowtext; mso-border-right-alt: 0.7500pt solid windowtext; mso-border-bottom-alt: 1.5000pt solid windowtext;" valign="center" width="221">查阅到《大明律》的具体内容</td><td style="border-width: 1pt 1.5pt 1.5pt 1pt; border-style: solid; border-color: windowtext; padding: 0pt 5.4pt; width: 149.05pt; mso-border-left-alt: 0.7500pt solid windowtext; mso-border-top-alt: 0.7500pt solid windowtext; mso-border-right-alt: 1.5000pt solid windowtext; mso-border-bottom-alt: 1.5000pt solid windowtext;" valign="center" width="198">得出明代法律至上的结论</td></tr></tbody></table>