狒狒逻辑一道充分必要的题，求解！

joyviva

Which one of thefollowing most accurately describes a reasoning error in Laura’s argument? （C）
(A) It purports toestablish its conclusion by making a claim that, if true, would actually contradictthat conclusion.
(B) It mistakenlyassumes that the quality of a person’s character can legitimately be taken toguarantee the accuracy of the claims that person has made.
(C) It mistakessomething that is necessary for its conclusion to follow for something thatensures that the conclusion follows. 把必要当作充分了
(D) It uses theterm “provable” without defining it.
(E) It fails to distinguishbetween a true claim that has mistakenly between believed to be false and afalse claim that has mistakenly been believed to be true.

请问，如果抽象出来，充分、必要条件各是什么？多谢！