Not all employment selection mechanisms that have a “disparate effect,” that is, that screens out a percentage of minorities or women disproportionate to their presence in the relevant labor market, are unlawful.

(A) that is, that screens out a percentage of minorities or women disproportionate to

(B) which means, that screens out a percentage of minorities or women disproportionate with

(C) which means, that screen out a percentage of minorities or women disproportionate with

(D) that is, that screen out a percentage of minorities or women disproportionate to（D）

(E) that is, that screens out a percentage of minorities or women disproportionate with

我想应该选A吧.答案是D..既然是a “disparate effect,” . 为什么不用单数呢?

关键是that is,后的那个that作什么用？如果是与that have a “disparate effect一

样修饰句子的主语employment selection mechanisms ，那么就该用动词复数形式了。

这道题我也没搞明白。主要是that?