Political scientist: The concept of freedom is hopelessly vague. Any definition of freedom will either exclude some acts that intuitively qualify as free or admit some acts that intuitively fall outside the concept. The notion of justice, fairness, and equality are equally indeterminate. This is why political organization should be disavowed as futile.
The reasoning in the argument is questionable because the argument
(A) generalizes from an unrepresentative sample to every political idea
--> the scientist does not generalize
(B) makes the unsupported claim that the concept of freedom is hopelessly vague
--> the scientist's claim is not about that the concept of freedom is hopelessly vague
(C) ignores the fact that some people view freedom as indispensable
--> does not mention
(D) fails to show any specific link between the vagueness of concepts such as freedom and the rejection of political organization
--> correct
(E) is mounted by some who has vested interest in the rejection of political organization
--> irrelevant
IMO, the answer is D.