[求助]大全413

   In the mid-1920’s the Hawthorne Works of the Western Electric Company was the scene of an intensive series of experiments that would investigate changes in working conditions as to their effects on workers’ performance.

(A) that would investigate changes in working conditions as to their effects on workers’ performance

(B) investigating the effects that changes in working conditions would have on workers’ performance

(C) for investigating what are the effects in workers’ performance that changes in working conditions would cause

(D) that investigated changes in working conditions’ effects on workers’ performance（B）

(E) to investigate what the effects changes in working conditions would have on workers’ performance

答案B。请问这题怎么做的？还有主语不是Works吗？谓语怎么用was呢？

Hawthorne Works是一个专有名词，一个工厂群的名字：

下面资料来自wikipedia：

楼上的这个都能被你找到。

不过我还是不知道这题怎么做的