求助：feifei50

ran2010zx

50. Which one ofthe following most accurately describes a reasoning error in Laura’s argument?

A.      It purports to establish itsconclusion by making a claim that, if true, would actually contradict thatconclusion.
B.       It mistakenly assumes that thequality of a person’s character can legitimately be taken to guarantee theaccuracy of the claims that person has made.
C.       It mistakes something that isnecessary for its conclusion to follow for something that ensures that theconclusion follows.
D.      It uses the term “provable”without defining it.
E.       It fails to distinguish betweena true claim that has mistakenly between believed to be false and a false claimthat has mistakenly been believed to be true.
答案是C,可我觉得B对啊，而且C是神马意思都看不懂，求牛人指导！谢谢！！

sdcar2010

Could you post the question first?

For your question, C says that Laura mistakes a necessary condition for a sufficient condition.