To avoid being blinded by the headlights of an oncoming vehicle, the driver should:

Answer: D — Use the right edge of the road as a guide

Using the right edge of the road as a guide is advisable when facing the headlights of an oncoming vehicle at night. This method helps drivers maintain their lane while reducing the glare from the bright lights of the approaching vehicle. By focusing on the right side of the road, a driver can stay oriented and avoid drifting into oncoming traffic, which is critical for safety. Looking at the left edge of the road or the center line can create confusion when encountering strong headlights, as these areas can become washed out by the light. Additionally, checking the rearview mirror does not provide any assistance in this scenario, as it does not help in navigating the immediate hazards posed by the oncoming vehicle. Thus, using the right edge offers a practical solution to maintaining safe visibility and control while driving at night.