[求助]请问that is与 which means的区别--焦急寻问

SC大全里537中,答案没有说清that is与 which means的区别.

请教NN们,帮忙以下.

请NN帮忙解答啊!自己顶一下.

MM为什么不去搜一下大全的讨论贴

which means 后跟主谓结构

that is 可像or 一样连接两个句子～

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

请教that is  与 which means 的区别

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that is =[that is to say] or [in other words]