How should a motorcyclist respond if they encounter a car making a sudden U-turn?

Answer: B — Brake and steer away if necessary

When a motorcyclist encounters a car making a sudden U-turn, the most effective response is to brake and steer away if necessary. This approach prioritizes the safety of the motorcyclist by allowing them to avoid a potential collision. Braking provides immediate control over speed, allowing the motorcyclist to reduce their momentum, which can be crucial in preventing an accident. Steering away is also vital, as it offers the opportunity to maneuver out of harm's way. This technique embodies the principle of evasive action, which is fundamental in defensive riding practices. While accelerating past the vehicle might seem like a way to avoid the situation, it can actually increase the risk of collision if the driver of the car does not see the motorcyclist or misjudges the speed. Continuously sounding the horn may alert the driver, but it does not guarantee that they will react appropriately or even notice the motorcyclist. Waiting for the car to complete its turn could potentially leave the motorcycle in the path of the vehicle, increasing the likelihood of a crash. Overall, braking and steering away provides the motorcyclist with the best chance to navigate the unexpected situation safely.