Final answer:
Mirrors must provide a view to the rear of the vehicle for a minimum of 200 feet.
Step-by-step explanation:
The correct answer is b) 100 feet.
In the United States, federal regulations state that every motor vehicle must be equipped with at least one mirror that provides a view to the rear of the vehicle for a minimum distance of 200 feet. This is to ensure the safety of the driver and other road users.
Therefore, mirrors must provide a view to the rear of the vehicle for a minimum of 200 feet.