请教nn一道语法题...谢谢:)

During the nineteenth century Emily Eden and Fanny Parks journeyed throughout India,sketching and keeping journals forming the basis of news reports about the princely states where they had visited

A forming the basis of news reports about the princely states where they had

B that were forming the basis of news reports about the princely states

C  to form the basis of news reports about the princely states which they have

D which had formed the basis of news reports about the princely states where they had

E  that formed the basis of news reports about the princely states they

为什么是答案是　e，不是d啊？

过去完成时表示过去的过去，这里显然不是这个意思。

用个定从就行了。

楼主发帖很积极，但要每次标题中注明题号和正确答案会节省大家时间并利人利己。。。

强烈推荐先参考GMAT大区各版块的置顶贴，好东东多多！相信它们可以解决你大部分问题。特别是GMAT语法讨论链接总录。如果阅读完上述相关内容仍未能解决你的问题，欢迎发帖继续讨论。发帖一定要注意“版规”里的要求哦。

谢谢！祝复习愉快！
                    

我是这么认为的，如果有错误，望NN们指正。

which只能修饰非限制性定语从句，要么prep.+which,要么 ,which，所以D不对。