求解大全C-5，thx

5.     At many colleges today, regulations have been imposed that forbid the use in speech or print of language that “offends” or “insults” the members of any group, especially women and racial, ethnic, and religious minorities. Although these regulations are defended in the name of “democracy,” they restrict freedom of speech and the press in a way that opposes the true spirit of democracy.

The argument above attempts to prove its case primarily by

(A) impugning the credentials of an opponent

(B) providing examples that support a theoretical principle

(C) taking advantage of inconsistencies in the definition of “democracy”

(D) revealing a contradiction in an opposing point of view（D）

(E) appealing to the patriotic feelings of its audience

我当时选的是C，不是很明白，请NN帮忙～～