何谓毛皮？板皮？羔皮？裘皮？

油汗附于羊毛表面，起到()、()，同时又能使纤维之间相互粘连形成闭合毛被，能够()、()等不良影响。

Whats the passage mainly about？

A．An outline for future research.

B．An analysis of a dispute between two theorists.

C．An expanded definition of commonly misunderstood terms.

D．A discussion of research findings in an ongoing inquiry.

请帮忙给出正确答案和分析，谢谢！

一般羊毛越粗，皮质层所占比例越大，越细的羊毛所占比例越小。()

Why do five-year-olds react differently to "Bonnie wrecks Anns pretend house"？

A．Because they occupy the stage of moral autonomy.

B．Because they can distinguish between harmful and harmless acts.

C．Because they are capable of justify an aggressor"s action.

D．Because they realize that some of the intentionals are excusable.

请帮忙给出正确答案和分析，谢谢！