1. 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
同意选D，that is是插入语，是2个从句并列修饰mechanisms，但是问题似乎应该有and连接２个定从吧？除非理解成that is这个插入语当成连词成分了？是这样理解吗？
that is 本身即可連接兩個對等的結構，包括兩個定從、甚至兩個句子，而不需另外加and。通常後者具有補充說明前者的作用。
longman的例句：I loved him - that is, I thought I did.
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