Regarding the use of the seat belt, as a general rule, an occupant of a passenger car other than the driver is obliged to...
A)wear it unfastened, except when travelling in the front seat.
B)wear it fastened only on interurban roads.
C)wear it correctly fastened.Correct
# Explanation: Use of the seat belt
The seat belt is mandatory for all vehicle occupants on any type of road (urban, interurban or motorway) and must be correctly fastened at all times. This passive safety measure is essential to protect occupants in the event of a collision or sudden braking, regardless of the speed or the place where they are driving.