How should a motorcyclist react upon seeing a vehicle turning left in front of them?

Answer: B — Be prepared to stop and apply brakes

When a motorcyclist sees a vehicle turning left in front of them, it is crucial to be prepared to stop and apply brakes. Left-turning vehicles often present a significant hazard for motorcyclists, as they can misjudge the motorcycle's speed and distance. By anticipating the possibility of the vehicle turning in front and getting ready to stop, the motorcyclist can act quickly to avoid a collision. This proactive approach is essential for maintaining safety on the road. In contrast, accelerating to pass quickly can increase the risk of an accident, as it may not provide enough time to react if the other vehicle suddenly changes its course. Honking to alert the driver is generally not a solution, as it does not guarantee that the driver will notice or respond appropriately; in some cases, it might escalate the situation. Changing lanes to avoid the vehicle can be a viable option but should be done with caution, as it may not always be safe depending on surrounding traffic. Overall, being prepared to stop is the safest and most effective reaction when a motorcyclist encounters a left-turning vehicle.