What is one key rule about headlights?

Answer: B — Use low beams in fog, rain, or snow

Using low beams in fog, rain, or snow is critical for maintaining visibility and safety while driving in adverse weather conditions. High beams can create a glare that reflects off precipitation, fog, or snow, making it more difficult to see. Low beams are designed to provide adequate illumination without causing glare, allowing both the driver and other road users to see better. This approach ensures that you can navigate safely while also being considerate of other drivers who may be affected by excessive light from high beams. This practice helps to enhance overall road safety in challenging weather environments.