When should a motorcycle rider use their turn signals?

Answer: B — Whenever changing lanes or turning

Utilizing turn signals is essential for a motorcycle rider to communicate intentions to other road users. The correct choice emphasizes that turn signals should be used whenever changing lanes or turning. This practice enhances safety by making other drivers aware of the rider's upcoming actions, thereby reducing the likelihood of collisions or misunderstandings on the road. For instance, when a rider intends to change lanes, signaling informs drivers nearby of the rider’s intentions, allowing them to adjust their speed or position accordingly. Similarly, signaling when turning ensures that both vehicles and pedestrians can anticipate the movement, providing a clearer flow of traffic. The other options do not reflect the full scope of when signaling is necessary. Using signals only when stopping, when parking, or solely in heavy traffic limits the communication that is crucial in many everyday riding situations. Each of these scenarios may benefit from clear signaling, but they do not capture the fundamental principle of using turn signals consistently whenever a change in direction or lane is being made.