Why is it advised against shifting gears while turning?

Answer: B — Shifting can cause the rear wheel to lock, leading to accidents.

Shifting gears while turning is discouraged primarily due to the risk of causing the rear wheel to lock, which can lead to a loss of control and potential accidents. When a rider shifts gears during a turn, it can result in an abrupt change in power delivery to the rear wheel. This sudden change can overwhelm the tire's grip, especially if the motorcycle is leaned over in a turn. If the rear wheel loses traction, it may skid or slide, significantly increasing the chance of a crash. Maintaining a steady speed and gear throughout the turn allows for smoother handling and better control. It ensures that the motorcycle remains stable and the rider can predictably maneuver through the turn. This approach reduces the likelihood of losing traction and enhances overall safety during riding.