这句句子应该选什么?

题目

这句句子应该选什么?
Some people say______the American society is more democratic than
British society in______it says less attention to class and wealth
.
A.what,that B.that,it C.it,it D.that,that

答案

that,that 所以答案是D
这里in that 表示“因为”,而不是定语从句的关系代词.否则应该表达为“in which”