单选题 If you had told me earlier, I ______ you to fulfill it.
A. would help B. will help C. would have helpedD. have helped

【正确答案】 C
【答案解析】本题考查对过去不存在的事实的假设，属虚拟语气。if从句用过去完成时态，主句用“would+have+过去分词”。