On this road, an additional circumstantial lane has been enabled; at what minimum speed must vehicles travel in said lane?
A)80 km/h.
B)Half of the generic speed indicated for each category of vehicles.
C)60 km/h or lower if so indicated.Correct
# Explanation: Circumstantial Additional Lane
Circumstantial additional lanes, also known as temporarily enabled emergency lanes, have a minimum speed of **60 km/h** or lower depending on the specific signage indicated by the traffic authority. This limitation exists because these lanes are created provisionally in special situations and require greater caution from the driver.