A vehicle occupied by 5 people and towing a light trailer, may it drive in a HOV lane?

A vehicle occupied by 5 people and towing a light trailer, may it drive in a HOV lane?
A)Yes, because 5 people are travelling in it.
B)No, it is prohibited.Correct
C)Yes, even if only the driver is travelling.
As a general rule, two- or three-wheeled motorcycles, passenger cars, buses with a maximum authorised mass exceeding 3,500 kilograms, articulated buses and adaptable mixed vehicles with the number of occupants set for each section may use the BUS-HOV lane.
The rest of the vehicles and combinations of vehicles, including passenger cars with trailers, cycles and mopeds, are prohibited from using it.
However, they may also be used, even when occupied only by the driver, by:
- Authorised vehicle types if they display the V-15 sign (reduced mobility badge).
- Two- or three-wheeled motorcycles.
- Buses with a maximum authorised mass greater than 3,500 kilograms and articulated buses.
- Vehicles classified as taxis according to the use criterion of Annex II of the General Vehicle Regulations, which have an external luminous module and a current taxi licence.
- Police, fire-fighting, civil protection, rescue and emergency medical assistance vehicles, and crews maintaining road installations and infrastructure.
- Passenger cars with V-25 environmental badge classified in the Vehicle Registry of the Central Traffic Headquarters Autonomous Body as "0 emissions".
- Passenger cars with V-25 environmental badge classified in the Vehicle Registry of the Central Traffic Headquarters Autonomous Body as "ECO", "C" or "B", only when this is indicated on the variable message panels at the entrance to the HOV lanes.