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Sigerson argues that the city should adopt ethical guidelines that preclude its politicians from accepting campaign contributions from companies that do business with the city. Sigerson’s proposal is dishonest, however, because he has taken contributions from such companies throughout his career in city politics.
The reasoning in the argument is most vulnerable to criticism on the grounds that the argument(A) confuses a sufficient condition for adopting ethical guidelines for politicians with a necessary condition for adopting such guidelines
(B) rejects a proposal on the grounds that an inadequate argument has been given for it
(C) fails to adequately address the possibility that other city politicians would resist Sigerson’s proposal
(D) rejects a proposal on the grounds that the person offering it is unfamiliar with the issues it raises
(E) overlooks the fact that Sigerson’s proposal would apply only to the future conduct of city politicians
Sigerson - City should adopt that campaign contributions from companies that do business with the city should not be accepted by politicians
Sigerson has taken such contributions from such companies throughout his career in politics.
Conclusion - Sigerson's proposal is dishonest.
The reasoning given for saying that his proposal is dishonest is that he himself has taken such contributions in the past. But the argument needn't be judged on the person who is proposing it. Also, past beliefs and actions of the person should not decide what good conduct of politicians should be in the future.
So the argument is vulnerable to criticism as per option (E).
(A) confuses a sufficient condition for adopting ethical guidelines for politicians with a necessary condition for adopting such guidelines
No such sufficient/necessary condition has been introduced.
(B) rejects a proposal on the grounds that an inadequate argument has been given for it
No. The reasoning of the argument does not talk about the inadequacy of the proposal. It just points out the past behaviour of Sigerson.
(C) fails to adequately address the possibility that other city politicians would resist Sigerson’s proposal
What the other city politicians may feel about the proposal is irrelevant.
(D) rejects a proposal on the grounds that the person offering it is unfamiliar with the issues it raises
Not true. The reasoning does not say that Sigerson does not understand the situation. It just says that his own behaviour was contrary to proposal in the past.
Answer (E)