[求助]大全987的第38题的代词问题

justsmile

According to a recent study, the elderly in the United States are four times more likely to give regular financial aid to their children as to receive it from them.

(A) the elderly in the United States are four times more likely to give regular financial aid to their children as
(B) the elderly in the United States are four times as likely to give regular financial aid to their children as it is for them
(C) the elderly in the United States are four times more likely to give regular financial aid to their children than
(D) it is four times more likely for the elderly in the United States to give regular financial aid to their children than they are
(E) it is four times as likely that the elderly in the United States will give their children regular financial aid as they are
请问c选项作为正确选项。them 和their不是指代不同么？不是在一句话里相同代词要指代相同内容么？

justsmile

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