Final answer:
Using a low gear to slow the vehicle down is the safest option when driving down a steep hill.
Explanation:
When driving down a steep hill, it is best to use a low gear to slow the vehicle down. This allows the engine to provide more resistance and control the speed of the vehicle effectively. Using a high gear can cause the vehicle to pick up speed, while coasting in neutral can be dangerous as it reduces control over the vehicle.
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