If the occupants of the rear seats of a vehicle are minors with a height equal to or less than 135 cm, what safety devices must they use?

If the occupants of the rear seats of a vehicle are minors with a height equal to or less than 135 cm, what safety devices must they use?
A)The seat belt installed in the vehicle.
B)Mandatorily a child restraint system welded to the vehicle's bodywork.
C)A child restraint device adapted to their height and weight.Correct
Minors with a height equal to or less than 135 cm must mandatorily use an approved child restraint system (CRS) adapted to their height and weight. The adult seat belt is not designed for their height and, instead of protecting them, could cause serious injuries in the event of an accident. Using the correct CRS is essential to ensure their safety.