甲机构对杨某的卖方主体条件确认的谨慎做法为（ ）。

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SQL Error: select id,body,options from ***_enewstiku where sourceid='28994' and id < 2359663 and id<>'2359663' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='28994' and id > 2359663 and id<>'2359663' order by id asc limit 5