单选题 One randomly selected group saw a speaker lecture on environmental ethics to a large, attentive audience, and a different randomly selected group saw the same speaker give the same lecture, with identical mannerisms, but to a smaller, less attentive audience. The first group called the speaker thoughtful and assured. The second group called the speaker vague and long-winded.
The information above can best serve as part of an argument against which of the following claims?

A、 The same social behavior can appear quite differently to different people when it is viewed in different social contexts.
B、 If the second group had seen the speaker lecture to a more attentive audience, its judgment of the speaker's personal qualities might well have been different.
C、 People's judgments of a speaker's personal qualities are based primarily on what the speaker says and the mannerisms with which the speaker says it.
D、 A listener's convictions about a speaker's claims can be influenced by other people's reactions to those claims.
E、 (E) A randomly selected group can sometimes arrive at a consensus about the personal qualifications of a speaker in a particular social situation.

【正确答案】 C

【答案解析】[解析] 本题是要找一个选项对本题中的“不同的观众对同一个演讲者相同的演讲评价不一”的论述进行反驳，(C)指出人们对演讲者个人素质的判断主要取决于他的谈话内容和说话方式，根据这个选项，两组听众对这个演讲者的反应应该相同，与本题段落中的“相同的人作相同的演讲，而听众反应不一”相矛盾，所以(C)正确。(A)为无关选项；(B)、(D)和(E)都支持了文中的观点。