What should you do if you need to stop quickly?

Answer: A — Apply both brakes firmly but smoothly

When you need to stop quickly on a motorcycle, applying both brakes firmly but smoothly is important for maintaining control and stability. Using both the front and rear brakes allows for balanced deceleration, which helps prevent skidding and maintains traction with the road surface. The front brake is particularly effective for slowing down because it handles most of the stopping power. However, it's crucial to apply the brakes smoothly to avoid locking the wheels, which can lead to a loss of control. Using only the rear brake would not provide sufficient stopping force and might cause the front of the motorcycle to dip, leading to instability. Turning off the engine is not advisable during a quick stop as it may prevent you from being able to maneuver or control the motorcycle effectively. Leaning back to shift weight might shift your center of gravity improperly, which could also destabilize the bike during an emergency stop. Thus, the recommended practice is to apply both brakes smoothly for effective stopping power.