Should the safety distance be increased when there is fog?

Should the safety distance be increased when there is fog?
A)Distance does not affect stopping when there is fog.
B)No, if the lights are on.
C)Yes, to have more space to react to any braking of the vehicle in front.Correct
With fog, visibility is drastically reduced, which increases the time taken to react to the unexpected. Therefore, it is essential to increase the safety distance to have more space and time to brake safely if the vehicle in front stops suddenly.