请教一个代词指代的问题

During the recession of 1973, home mortgage foreclosures resulted in tens of thousands of Americans being evicted from homes that they can no longer afford monthly payments.

(A) that they can

(B) that they could

(C) on which they can

(D) because they can（E）

(E) for which they could

看了大全解释说，E这里的they是指代正确的，其他的they都指代不明，。。

这个指代到底怎么确认阿。

还有请教这里的that可以说做宾语从句不？

这道题选E吧？不是选B吧

后面需要用could剩下BE，afford some money for sth。E里面的which指代前面的homes，介词提前，非常正确的啊。

B的that指代homes作其定语，不对