OG 159,居然没人问过？

While depressed property values can hurt some large investors, they are potentially devastating for home-owners. whose equity--in many cases representing a life's savings--can plunge or even disappear.

(A)  they are potentially devastating for homeowners, whose

(B)  they can potentially devastate homeowners in  that their

(C)  for homeowners they are potentially devastat­ing, because their

(D)  for homeowners, it is potentially devastating in that their

(E)   it can potentially devastate homeowners, whose

Choice A is the best. Its wording is unambiguous and economi­cal. The plural pronoun they agrees with its antecedent, property values. The pronoun whose clearly refers to homeowners and efficiently connects them with the idea of lost equity. In B, C, and D, substituting in that their or because their for whose is wordy and confusing since the antecedent of their might be they, not homeowners. Furthermore, can potentially is redundant in B and E. Both D and E use the singular pronoun it, which does not agree with its logical antecedent, property values.

我的问题是这个while在此做何解释？另外A中的they怎么就没有指代home-owers的歧义呢？

1. while:during the time that something is happening
They arrived while we were having dinner.

2.in A, The plural pronoun they agrees with its antecedent, property values.根据从句的主语优先指代主句的主语

3 在B中 they refer to property value, while their seem to logically refer to homeowners. And it is not allowed that the same pron. refer to two different things in gmat sc.

从句的主语优先指代主句的主语

这是ETS明确的 无论从句在先有后

OG中有好多这样的例题 你找一下吧

这里不是进行时，devastating 是形容词。

OG中是有这多这样的例子，但也有例外，我一时找不到依据。

我先把这个从句的主语优先指代主句的主语当成ETS的prefer；

谁能帮我解释一下这里的while？

I think "While" 这里是转折，意思是 “低弥的资产价格可能伤害大的投资者， 对home-owner 可能就是一种灾难了，因为他们的资产可能是一生的积蓄。。。

另外they指代 "depressed property values" 在逻辑上名正言顺，因为 大的投资者不可能是”home-owner" 的大灾难。