What is the function of the handbrake?
A)Reduce the vehicle's speed in the city.
B)Reduce the vehicle's speed when traveling on a road with a prolonged slope.
C)Immobilize the vehicle when parking.Correct
# Explanation: Function of the Handbrake
The handbrake or parking brake has the main function of **keeping the vehicle immobile when parked**, preventing it from rolling down slopes or moving involuntarily. It should not be used to reduce speed while driving, as that is the job of the service brake. The handbrake is especially important on sloped terrain to ensure the safety of the vehicle and the people around it.