GWD 24-8

24-8 The results of the company’s cost-cutting measures are evident in its profits, which increased five percent during the first three months of this year after it fell over the last two years.

(A) which increased five percent during the first three months of this year after it fell

(B) which had increased five percent during the first three months of this year after it had fallen

(C) which have increased five percent during the first three months of this year after falling

(D) with a five percent increase during the first three months of this year after falling

(E) with a five percent increase during the first three months of this year after having fallen

这道题我想也没想就排除了 A B C， 可是答案却是C，请帮忙解释一下

Some NN's have discussed this question before. Maybe you can find what you need there.

1. 原文画线部分 it 不能指代 profits, 单复数问题，A 错。

2。原文主句是现在时，根据表达的含义和语气，C 的完成时无可厚非

3。B 用过去完成时错

4。D,E, 用 with 短语表达复合句含义，不好。with 短语的逻辑主语不明。

可是我觉得with是独立主格结构,那位牛牛能帮忙解释一下, 到底什麽时候用which,什麽时候用独立主格

我觉得which指代不清

thanks, but I have another stupid question,

over the last two years 不是完成时的标志吗，而且独立主格也可以修饰整个句子

为什麽不是E呢