When driving at night in a rural area, what should you do if you meet an oncoming vehicle with its headlights off?

Answer: C — Flash your headlights

If you meet an oncoming vehicle with its headlights off, flashing your headlights is the most appropriate response. This is because it will alert the other driver to their error and remind them to turn their headlights on for safety. Flashing your brakes or waving your hands may also get their attention, but it may not communicate the specific issue with their headlights. Pulling over where it is safe is not necessary as it could potentially be dangerous to stop in the middle of the road at night.