What is the reason for ______there

问题描述:

What is the reason for ______there
A.not your going B.not your go
C.your not going D.you not to go
这题选什么?为什么?

C
这里缺一个名词 因为for 是介词
your not going 才是名词 其他的不是句子 就是残缺