What should you do if you encounter a vehicle backing out of a driveway?

Answer: B — Yield to the vehicle and wait until it has fully exited

Yielding to the vehicle backing out of a driveway is the safest and most responsible course of action. When a vehicle is in the process of reversing, the driver may have limited visibility and may not be aware of other vehicles or pedestrians nearby. By yielding and waiting until the vehicle has fully exited the driveway, you reduce the risk of a collision. This decision demonstrates an understanding of right-of-way laws and an emphasis on safety for all road users. It's crucial to respect the movements of other drivers, particularly in situations where one party might have limited awareness of surrounding traffic. Maintaining speed or attempting to pass a backing vehicle can lead to dangerous situations, as you could collide with the vehicle or catch the driver off guard. Similarly, honking can sometimes startle the driver rather than serve as a helpful warning. Driving around the vehicle without stopping, especially if it is still in motion, also increases the risk of an accident. Therefore, yielding is the appropriate and prudent response in this scenario.