On a motorway, is it permitted to drive at an abnormally reduced speed in thick fog?
A)No, because it is a motorway and is a very safe road.
B)Yes, if traffic is light, but it is prohibited if traffic is heavy.
C)Yes.Correct
# Explanation
Yes, it is permitted to drive at an abnormally reduced speed on a motorway when there is thick fog. Road safety is a priority, and reducing speed is a necessary measure to adapt driving to adverse visibility conditions. This practice is contemplated in traffic regulations and is essential to avoid accidents.