When must your headlights be turned on?

Answer: B — 30 mins after sunset

The headlights must be turned on 30 minutes after sunset to ensure visibility and safety while driving in low-light conditions. This requirement is in place because it can become difficult to see other vehicles, pedestrians, and road conditions as daylight fades. By turning on headlights at this time, drivers help to improve their visibility as well as be more visible to others on the road. While it may seem reasonable to wait until a more significant amount of time has passed after sunset, the law aims to ensure drivers are prepared for the darkness that sets in quickly, thus promoting safety and reducing the risk of accidents during twilight hours.