When driving in the rain, fog, or smoke in the daytime, what lights should you use?

Answer: B — Low beam headlights

When driving in conditions such as rain, fog, or smoke during the daytime, using low beam headlights is essential for improving visibility and ensuring that other drivers can see you. Low beam headlights project light down towards the road, reducing glare that can be problematic in these weather conditions. Using high beam headlights in such situations can actually worsen visibility for both you and other drivers because the bright light can reflect off of the precipitation, fog, or smoke, creating a blinding effect. Choosing not to use any lights or relying solely on parking lights is inadequate in these scenarios. It can lead to decreased visibility and an increased risk of accidents. Therefore, the appropriate and safest option is to use low beam headlights to enhance visibility and maintain safety on the road.