What is the recommended action if a motorcyclist begins to lose traction?

Answer: B — Ease off the throttle and maintain a straight line.

When a motorcyclist begins to lose traction, the recommended action is to ease off the throttle and maintain a straight line. This approach allows the rider to avoid making sudden movements that could exacerbate the loss of traction. By reducing throttle, the motorcycle can temporarily regain grip on the surface, as applying too much power can lead to further slipping, especially if the loss of traction is due to loose surfaces like wet pavement or gravel. Maintaining a straight line is crucial because it helps distribute weight evenly across the tires, thus aiding in stability. Sharp steering maneuvers or quick braking can lead to a loss of control; sharp turns can further destabilize the bike, and immediate braking may cause the wheels to lock up, leading to a skid. Overall, easing off the throttle while keeping the motorcycle upright and moving in a straight line is essential for regaining control and ensuring safety during a traction loss situation.