Mark the letter A, B, C or D on your a...

Câu hỏi: Mark the letter A, B, C or D on your answer sheet to indicate the sentence that best combines a pair of sentences in the following question.The driver in front stopped so suddenly. Therefore, the accident happened.

A If the driver in front didn't stop so suddenly, the accident wouldn't happen.

B If the driver in front hadn't stopped so suddenly, the accident would have happened.

C If the driver in front hadn't stopped so suddenly, the accident wouldn't have happened.

D If the driver in front had stopped so suddenly, the accident would have happened.