Questor wrote:
One idea for Social Security reform was to disallow payments for those with a certain level of income; although the idea was rejected, citizens can choose to refuse social security payments for private sources of income, whether derived by pension funds or personal savings, if they want.
(A) for private sources of income, whether derived by pension funds or personal savings
(B) in favor of private sources of income, whether derived from pension funds or personal savings
(C) for private sources of income, whether derived from pension funds or personal savings
(D) and use private sources of income, derived either by pension funds or personal savings
(E) rather than private sources of income, whether derived from pension funds or personal savings
KAPLAN OFFICIAL EXPLANATION:
First off, the correct idiom for refuse is for (He refused one for the other). No, this isn't a common idiom, nor is it a particularly eloquent one, and that's why this question is hard. Eliminate (B), (D), and (E). Choices (A) and (C) ask you to choose between derived by and derived from. Derived from is the correct idiom. (C) is right. Unfortunately, idioms just need to be memorized since they follow no general rules, but you'll have an intuitive sense of most of them. You'll have the best shot of choosing the correct idiom if you isolate it or consider it in terms of a simple sentence, as we did with He refused one for the other above.