Final answer:
The best way to use your brake pedal when going down a steep hill is with a light steady pressure.
Step-by-step explanation:
The best way to use your brake pedal when going down a steep hill is with a light steady pressure (option B). This allows you to maintain control of the vehicle and prevent the brakes from overheating. Applying repeated strong pressure and then releasing it (option C) or using stronger pressure as the vehicle goes down the hill (option D) can lead to excessive wear on the brake pads and decrease the effectiveness of the brakes.