Was it near the white building, if I may ask, ____ Martin Luther King gave the speech “I have a dream”?

A．where

B．that

C．in which

D．why

根据瑜伽的学说人体是由四大元素组成。即：气（心轮）、火（脐轮）、水（生殖轮）、土（海底轮）。