At night, within how many feet of an approaching vehicle from the rear must you dim your bright headlights?

Answer: B — 300 feet

When driving at night, it is essential to ensure that your bright headlights do not interfere with the vision of other drivers, especially those approaching from the rear. Dimming your bright headlights within 300 feet is important because it helps prevent blinding drivers behind you. This distance is established as a safety measure to enhance visibility for all road users and minimize the risk of accidents. Properly dimming your headlights allows the driver of the vehicle behind you to maintain their focus on the road ahead without being distracted or momentarily blinded by your lights. Understanding this distance is crucial for responsible driving during nighttime conditions and contributes to safer driving practices.