When should headlights be used?

Answer: B — In conditions of reduced visibility or at night

Headlights are essential for safe driving, as they significantly improve visibility in various conditions. The correct response emphasizes that headlights should be used in situations where visibility is reduced, such as at night or during adverse weather conditions (like rain, fog, or snow). This approach is important because it enhances the driver's ability to see the road ahead and be seen by other motorists. Using headlights only at night would limit their effectiveness, as there are times during the day, such as when it’s raining or cloudy, when visibility can be compromised. Similarly, headlights should not just be restricted to heavy rain or fog; they are beneficial in a broader range of low visibility conditions. Proper use of headlights in accordance with the rules ensures that all road users can navigate safely.