Final answer:
An HOV lane can only be used if your vehicle has multiple occupants. Its purpose is to encourage carpooling and reduce congestion.
Step-by-step explanation:
You may drive in a High Occupancy Vehicle (HOV) lane if your vehicle has multiple occupants. This means that eligibility to use an HOV lane is solely based on the number of passengers in the vehicle. Options a, b, and d, such as driving faster or slower than the flow of traffic or being in a hurry, do not grant permission to use HOV lanes. HOV lanes are designed to encourage carpooling and reduce traffic congestion by reserving lane access for vehicles with a high occupancy of passengers, typically two or more people per vehicle.