When should you turn on your headlights?

The correct choice is based on the requirement to enhance safety while driving. Headlights should be turned on not just when it's dark outside, but also during poor visibility conditions, which may include rain, fog, snow, or other situations where visibility is compromised. Additionally, using headlights at night is crucial to ensure that you can see the road clearly and that other road users can see your vehicle.

This practice is essential for driving safety as it improves the visibility of your vehicle and allows you to see potential hazards more clearly. By turning on your headlights in poor visibility conditions, you are following best practices that help reduce the risk of accidents. It’s important to note that simply turning on headlights in darkness alone does not encompass all scenarios where their use is necessary, which is why the other options are not as comprehensive.