Question 31: The car driver in front stopped so suddenly. Therefore, the accident happened.
A. If the car driver in front didn’t stop so suddenly, the accident wouldn’t happen.
B. If the car driver in front hadn’t stopped so suddenly, the accident wouldn’t have happened.
C. If the car driver in front hadn’t stopped so suddenly, the accident would have happened.
D. If the car driver in front had stopped suddenly, the accident would have happened.