When should you use your headlights?

Answer: D — All of the above

You should use your headlights not only after dark or during rain but also on cloudy days as it can improve visibility for both yourself and other drivers. Choosing any of the three other options may limit visibility and increase the risk of accidents. Additionally, using headlights during the day in certain weather conditions can also make your vehicle more noticeable to other drivers, reducing the risk of collisions. Therefore, using your headlights in all three scenarios (after dark, during rain, and on cloudy days) is the safest and most responsible option.