It was for this reason ________ her uncle moved out of New York and settled down in a small village.

A.which

B.why

C.that

D.how

答案及解析： C

解析：

for this reason是一个完整部分，去掉It was和空白处，句意完整，只不过语序发生了变化．因此该题测试的是强调句型的用法．