Final answer:
A) Before starting the descent. The safest time to downshift when going downhill is before starting the descent.
Step-by-step explanation:
The safest time to downshift when going downhill is before starting the descent. Downshifting before starting the descent allows you to control your speed and maintain stability throughout the downhill journey.
When you downshift before starting the descent, it helps prevent your vehicle from gaining excessive speed and helps you keep a safe distance from other vehicles on the road. It also enables you to have better control over your vehicle's braking and acceleration.
By downshifting before starting the descent, you can avoid any sudden surprises or hazards that may arise during the descent. This proactive approach to downshifting can enhance your safety, reduce wear and tear on your brakes, and improve overall vehicle performance