In foggy conditions, you should...?

In foggy conditions, increasing your following distance is particularly important because visibility is significantly reduced. When driving in fog, the ability to see ahead and judge distances is impaired, which means you may not be able to react as quickly to the vehicle in front of you. By increasing your following distance, you create a larger buffer that allows for a safer reaction time in the event that the vehicle in front of you stops abruptly. This extra space helps mitigate the risk of collisions caused by insufficient stopping distance in low visibility conditions.

The other choices may imply that maintaining or decreasing following distance is acceptable, but these approaches do not take into account the additional challenges posed by fog. Maintaining the standard following distance may not provide enough time to react, and decreasing it could lead to a higher likelihood of rear-end collisions. Hence, increasing the following distance is the best practice for safety in foggy driving conditions.