Final answer:
The best course of action when being followed too closely while driving is to drop back farther from the vehicle ahead.
Step-by-step explanation:
When you are being followed too closely while driving, it is usually best to drop back farther from the vehicle ahead (option b). This allows for a safe following distance between you and the vehicle behind you, reducing the risk of a collision. Moving closer to the vehicle ahead (option a) would not create enough space and passing the vehicle ahead (option c) may not be safe or legal in certain situations. Therefore, the correct answer is option b) Drop back farther from the vehicle ahead.