It was for this reason her parents moved out of London and settled down in a mountain village.
A. that
B. which
C. why
D. how
网友回答
(答案→)A. that
B. which
C. why
D. how
解析：如果选择why构成定语从句，则需要去掉this reason前的for，所以这里不是定语从句。因为去掉it was和that，剩下的是一个完整的句子，所以是强调句型，强调句的结构It is/was+被强调部分+that+句子的其他成分