What type of headlights should you use when driving in fog?

Answer: B — Low-beam headlights

Using low-beam headlights when driving in fog is important because they help to minimize the amount of light that is reflected back at you by the fog, rain, or snow. High-beam headlights can create a blinding effect as the light reflects off the water droplets in the fog, reducing visibility instead of improving it. Low beams are designed to direct light closer to the ground and create a wider spread of light that can illuminate the road and the edges of the driving lane without causing glare. Fog lights can also be used in conjunction with low beams, but they are not a substitute for them. In general, parking lights are not suitable for driving conditions requiring illumination, as they are designed primarily to increase visibility of a parked vehicle to others rather than provide adequate light for safe driving.