How should you adapt your driving in foggy conditions?

In foggy conditions, the correct approach is to use low-beam headlights, not high-beam or all lights off. Therefore, neither A nor B is correct.

Using high-beam headlights can cause the light to reflect off the fog, making visibility worse. Low-beams are designed to help illuminate the road without causing glare. Additionally, you should reduce speed and maintain a greater following distance.

For safer driving in fog, always be cautious and aware of your surroundings! If you have more questions or need further details, feel free to ask.