An effective control device that is the least used in emergency situations is d. Accelerator.
In emergency situations, it is usually necessary to slow down or stop the vehicle quickly to avoid a collision or other hazards. Therefore, the most important control devices are the brakes and steering wheel. The horn can also be used as a warning signal to alert other drivers or pedestrians of the emergency situation. However, the accelerator pedal should be released or gently pressed in emergency situations, rather than being used aggressively, as this can increase the risk of an accident.