Final answer:
When your car experiences brake failure while driving downhill, downshifting to a lower gear is the correct course of action. By using engine braking, you can reduce the speed of the car without relying solely on the brakes. It is important to activate the emergency hazard lights, honk the horn, and steer to a safe location before seeking professional assistance to fix the brake issue. So, the correct option is B. Downshift to a lower gear.
Step-by-step explanation:
When your car experiences brake failure while driving downhill, it is important to follow the appropriate steps to ensure your safety.
Option B, which is downshifting to a lower gear, is the correct course of action in this situation.
By downshifting to a lower gear, you can use the engine's resistance to slow down the car.
This technique is known as engine braking.
It helps to reduce the speed of the car without relying solely on the brakes, which may not be effective in the event of brake failure.
Additionally, you should also activate the emergency hazard lights, honk the horn to alert other drivers, and steer to a safe location away from traffic.
Once you have stopped, it is crucial to seek professional assistance to fix the brake issue before continuing your journey.
Therefore, the correct option is B. Downshift to a lower gear.