At what distance must you dim your high beams when following another vehicle?

Answer: B — Within 300 feet

When driving at night, it's essential to ensure that your high beams do not interfere with the vision of other drivers on the road. You must dim your high beams when following another vehicle within 300 feet. This distance is crucial because it helps prevent blinding the driver ahead of you with bright lights, ensuring their safety and maintaining a clear line of sight for both vehicles. Dimming your high beams at this distance also aligns with rules designed to promote safer driving conditions for everyone on the road.