单选题 So-called environmentalists have argued that the proposed Golden Lake Development would interfere with bird-migration patterns. However the fact that these same people have raised environmental objections to virtually every development proposal brought before the council in recent years indicates that their expressed concern for bird-migration patterns is nothing but a mask for their antidevelopment antiprogress agenda. Their claim therefore should be dismissed without further consideration.
Which one of the following questionable argumentative techniques is employed in the passage?

A、 taking the failure of a given argument to establish its conclusion as the basis for claiming that the view expressed by that conclusion is false.
B、 rejecting the conclusion of an argument on the basis of a claim about the motives of those advancing the argument.
C、 using a few exceptional cases as the basis for a claim about what is true in general.
D、 misrepresenting evidence that supports the position the argument is intended to refute.
E、 (E) assuming that what is true of a group as a whole is necessarily true of each member of that group.

【正确答案】 B

【答案解析】[解析] 有疑问的论证方法，相当于指出逻辑错误，属于“逻辑应用与技法”类题目。段落里根据“环境保护论者总是提出反对意见”，就得出结论“他们的宣称应该被忽略”。推理犯了什么错误或使用了哪种可疑的论证方法呢?很明显，(B)是正确的。