The driver in front stopped so suddenly.Therefore...

Câu hỏi: 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 wouldn’t have happened.

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

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