GWD25-Q5

A吧，我觉得。

by
        which native peoples of the Western Hemisphere (were) decimated

ls你指的是B吧？

不是,是A,

B的话省略了WERE, BY WHICH引导应该是个非限制性定语从句,应该有谓语动词吧

答案是B吗

这道题我也错了，我选了b，后来看下应该选a,devastation and enslavement 应该是一个整体，谓语用单数；

而且b中的by progrss也不对，这些人被decimated, 不应该是by progrss

不同意你对A选项的解释，devastation and enslavement 无论是不是整体都应该用复数形式

A中用了has这个单数形式说明that指代progress

不过这道题我选了E，我认为that指代devastation and enslavement 更符合逻辑，所以应该用that have的形式

我觉得还是站在E这边，我们看原题中

For many revisionist historians, Christopher Columbus has come to
        personify devastation and enslavement in the name of progress that
            has decimated native
            peoples of the Western Hemisphere.   E

A.      devastation and enslavement in the name of progress that has decimated native peoples of the Western Hemisphere

B.       devastation and enslavement in the name of progress by
        which native peoples of the Western Hemisphere
            decimated

C.      devastating and enslaving in the name of progress those native
        peoples of the Western Hemisphere which in the name of progress are decimated.

D.      devastating and enslaving those native peoples of the western
        Hemisphere which in the name of progress are decimated.

E.       the devastation and enslavement in the name of progress that
        have decimated the native peoples of the Western Hemisphere.

如果想上面的同学讲的把devastation and enslavement 看成一个整体，那么定语从句由于其中的单数谓语动词has则有可能修饰devastation and enslavement 或者 progress ，这样本身就已经造成了不concise（只一点是GMAT  SC的总纲）
    

另外，我记得好像是在熏衣紫草大牛的一片总结中看到过，确定定语从句的修饰对象依靠单复数和依靠逻辑意思是最主要的两种方法，而这里显然从逻辑意思上来讲E应该是更符合逻辑意思的
    

请大家指正