英语高手来帮做2道选择题.请给出理由.

题目

英语高手来帮做2道选择题.请给出理由.
A power struggle,however,is under way between Pirard,a Jansenist,and a pro-Jesuit __led by the Vice Principal
a.facility b.faculty c.faction d.fatality
They were testing the __ of drinking alcohol on a medicine called Plendil.
a.drive b.prescription c.effect d.depth
主要是解释虾第二题为啥不能选C。

答案