140. Declining values for farm equipment and land, the collateral against which farmers borrow to get through the harvest season, is going to force many lenders to tighten or deny credit this spring.
(A) the collateral against which farmers borrow to get through the harvest season, is
(B) which farmers use as collateral to borrow against to get through the harvest season, is
(C) the collateral which is borrowed against by farmers to get through the harvest season, is
(D) which farmers use as collateral to borrow against to get through the harvest season, are
(E) the collateral against which farmers borrow to get through the harvest season, are
答案选e，没什么疑惑。但是由此想到一个问题，如果一句话的结构是A,B,is... 其中b是a的同位语，而且a和b都是可数名词单数，那这样会不会产生起义，就是is不知道修饰谁？！
请教nn！谢谢！ | 
