Which lights must be checked during a pre-trip inspection?

During a pre-trip inspection, it's essential to check the headlights, brake lights, turn signals, and hazard lights to ensure the vehicle operates safely and meets regulatory requirements. Headlights are crucial for visibility at night or in poor weather, while brake lights communicate to other drivers when the vehicle is stopping. Turn signals are vital for indicating a driver's intentions when changing lanes or making turns, helping to prevent accidents. Hazard lights serve a critical role in alerting other road users to potential danger, particularly when the vehicle is stationary or experiencing issues.

By thoroughly inspecting all these lights, the driver ensures that the vehicle is safe to operate and that communication with other drivers on the road is clear. Failure to check any of these lights increases the risk of accidents and can lead to violations of traffic laws. The other options, which suggest checking only one type of light, are insufficient for ensuring overall safety and compliance.