If you break hard on a straightaway and your rear wheel locks, what should you do?

Answer: B — Keep the rear wheel locked until stopped

When experiencing a situation where the rear wheel of a motorcycle locks while braking, releasing the brake immediately is the best option to regain control of the bike. Keeping the rear wheel locked can lead to a loss of stability and control, which can significantly increase the risk of a crash. When the rear wheel is locked, it no longer helps to slow the motorcycle effectively and instead causes skidding, which can make it challenging to steer. By releasing the brake, the rider allows the rear wheel to start rotating again, bringing back traction and stability, which is essential for controlling the motorcycle through a braking situation. Additionally, steering towards the roadside or changing speed gradually would not effectively address the immediate danger of a locked wheel, and could complicate recovery from the skid. It's crucial for riders to know how to handle their brakes properly to maintain safety and control on the road.