选哪个,请给出原因.A.while B.in which C.except that D.in that

题目

选哪个,请给出原因.A.while B.in which C.except that D.in that
The British Museum was unique_______it housed both a national museum of antiquities and a national library in the same buliding.

答案

in that包含在这一点上由于的意思,这里要一个表原因的词