What action should you take when driving in fog?

Answer: A — Use low beam headlights for better visibility

Using low beam headlights in fog is the most effective action because they minimize the amount of light that reflects off the moisture droplets present in the fog. High beam headlights can create a glare, causing visibility to worsen as the light is reflected back at the driver. Driving without headlights can dramatically reduce your visibility to other drivers and can make it difficult to see the road ahead. Speeding up in fog is particularly dangerous, as it significantly increases the likelihood of losing control of the vehicle or colliding with other vehicles or obstacles, given that visibility is already compromised. Therefore, low beam headlights are essential for maintaining safety in foggy conditions.