（求助）og165

165. At Shiprock, New Mexico, a perennially powerful girls' high school basketball team has become a path to college for some and a source of pride for a community where the household incomes of 49 percent of them are below the poverty level.

(A)  where the household incomes of 49 percent of them are

(B)   where they have 49 percent of the household incomes

(C)  where 49 percent of the household incomes are

(D)  which has 49 percent of the household incomes

(E)   in which 49 percent of them have household incomes

C, the best choice, uses a clear, direct, and economical adjective clause to indicate the percentage of household incomes below the poverty line in the community in question. Choices A and E insert the pronoun them without a stated antecedent. In addition, the wording of both A and E confuses the percentage of community residents (the implied referent of them) with the percentage of households, not the same thing at all. Choice B introduces the pronoun they without an anteced­ent. Furthermore, the use of have in B and E and of has in D illogically suggests that the community possesses 49% of all the household incomes below the poverty line.

og解释在假定them指代正确的前提下认为a和e混淆了居民的百分比和收入的百分比

我的问题：a：49%居民的家庭收入，低于....

                 e：49%的居民拥有的家庭收入，低于...

怎么就产生歧义了？和正确答案c的49%的家庭收入都是可以理解的啊？

(A)  where the household incomes of 49 percent of them are

A和E的them指residents－个人的角度，而不是household－家庭的角度。49％的人收入低于贫困线，和49％的家庭收入低于贫困线，这是不同的概念。比如特别富有的社区里，妇女都不上班，她们连收入都没有，肯定低于贫困线，可是整个社区是很富有的。

也就是说a\e：49%的人收入，低于贫困线----------穷人多，但社区可能富裕，所以，错

              c：49%的家庭的收入，低于贫困线--------社区穷，表达原文想表达的，正确

非常清楚了，感谢。

我明白ETS说them没有明确的指代对象，但问题是凭什么说them是指residents而不是household呢？

我的理解：

(D) which has 49 percent of the household incomes

低于贫困线中的家庭收入的49%

(C) where 49 percent of the household incomes are

49%的家庭的收入是低于贫困线的

所以C要比D好