Which vehicles are permitted to travel on a lane that has been opened, for reasons of traffic flow, in the direction opposite to the usual one?

Which vehicles are permitted to travel on a lane that has been opened, for reasons of traffic flow, in the direction opposite to the usual one?
A)Motor vehicles and vehicles with a trailer up to 750 kg GVW.
B)Motor vehicles exceeding 3,500 kg GVW and motorcycles.
C)Passenger cars and motorcycles only.Correct
Only motorcycles, with or without a sidecar, and passenger cars without a trailer may travel on lanes opened in the direction opposite to the usual one for reasons of traffic flow. On the other hand, when lanes are opened due to roadworks, all vehicles authorised to travel on the road may use them, unless expressly prohibited.