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 (E) that is, that screens out a percentage of minorities or women disproportionate with
"that is "这里是什么作用？是插入语吗？不相当于“what means”? 后面的“that”是引导定语从句的吗？“disproportionate to their presence in the relevant labor market,”有时修饰什么的呢？
糊涂啊！！！ | 
