Despite the efforts of a small minority of graduate students at one university to unionize, the majority of graduate students there remain unaware of the attempt. Most of those who are aware believe that a union would not represent their interests or that, if it did, it would not effectively pursue them. Thus, the graduate students at the university should not unionize, since the majority of them obviously disapprove of the attempt. The reasoning in the argument is most vulnerable to criticism on the grounds that the argument
A: blurs the distinction between active disapproval and mere lack of approval
B: tries to establish a conclusion simply on the premise that the conclusion agrees with a long-standing practice
C: presumes that simply because a majority of a population is unaware of something, it must not be a good idea
D: fails to exclude alternative explanations for why some graduate students disapprove of unionizing
Choose A, B, C or D as your solution.
A