What should you do if your headlights fail at night?

Answer: C — Pull over safely and turn on your hazard lights

If your headlights fail at night, the appropriate action is to pull over safely and turn on your hazard lights. This approach ensures your safety by moving your vehicle out of the traffic flow, minimizing the risk of accidents. Activating your hazard lights alerts other drivers of your situation, making them aware that your vehicle is stationary and potentially disabled. Choosing to call for roadside assistance isn't immediate and could leave you in a dangerous position on the road. Turning on your high beams may not be effective if your headlights are completely out, and it could potentially blind oncoming traffic. Continuing to drive under these circumstances significantly increases your risk of a collision, as you cannot see well and are not visible to others. Overall, pulling over is the best response to ensure both your safety and that of other road users.