求问现在分词做定语的问题

leelaugh

我记得之前看到过-ing作定语也需要考虑时态, -ing指的是当时正在做的状态. 那么下面这道题. B选项investigating 可以修饰1920s的试验吗. 谢谢NN!!! 我搞不清楚阿,谢谢! 还有这个-ing定语的时候到底需要考虑句子的时态吗 ?
In the mid-1920s 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 the effects on workers' performance are that changes in working conditions would cause
D that investigated changes in working conditions' effects on workers' performance
E to investigate what the effects changes in working conditions would have on workers' performance

dorrit_wjx

我的理解是。。现在分词做定语时，要求investigate这个动作和主句主语的动作是同时发生的，而不一定是现在～