The war and the sufferings ----- caused affected him greatly

B
The war and the sufferings (it caused) affected him greatly.括号部分是定语从句,修饰war 和sufferings,表示的是它引起的战争和苦难.从句完整的结构是:it caused the war and the sufferings ,the war and the sufferings 做宾语,可以省略或用that/which,但句子少了主语it,所以要呼回去.