When there are ice patches on the roadway, what is the most advisable and safe way to descend a prolonged slope?

A)Reducing speed with the handbrake, especially when negotiating curves.
B)With high gears to improve the grip of the drive wheels.
C)With low gears to brake as little as possible.Correct
# Explanation
When there are ice patches on a slope, you must use **low gears (1st or 2nd gear)** so the engine acts as a brake and controls speed without having to brake constantly. This prevents the wheels from locking and losing grip, reducing the risk of skidding. Braking with the handbrake or using high gears are dangerous practices under these conditions because they favor vehicle sliding.