When driving in foggy weather, what should you do?

The correct answer is: Set the headlights to the lowest setting and turn on the fog lights.

Explanation: When driving in fog, visibility is significantly reduced, necessitating special measures to enhance the visibility of oneself and other vehicles. By setting the headlights to the lowest setting and turning on the fog lights, drivers can better see the road ahead while also making it easier for other drivers to see their vehicle, thereby reducing the risk of accidents. Using the lowest setting for headlights instead of full beams is to avoid strong light reflecting back into the driver's line of sight, which can impair driving safety. Fog lights are designed to provide better illumination of the road surface in low visibility conditions, making them very useful when driving in fog. The regulations for driving in fog are critical as they help ensure the safety of drivers in poor visibility conditions, thus safeguarding everyone on the road.