I still remember the accident and the troubles ____ has caused to me．

题目

I still remember the accident and the troubles ____ has caused to me．
A．which x05B．what x05C．it x05D．that
请问选哪一个?

答案

C
It 复指前边说过的accident
句意是：我还记得那场事故,和它带给我的伤害.