What is the term used for operating a bus that is out of service?

Answer: B — Deadheading

The term used for operating a bus that is out of service is "deadheading." This refers to the practice of moving a transit vehicle without any passengers on board, typically for the purpose of transporting it to the depot, positioning it for the next route, or returning it after the completion of its service. It is a necessary operational practice that ensures buses are in the right place when needed, despite not providing passenger service during those moves. Deadheading is important for maintaining the efficiency and scheduling of public transit systems. When a bus is out of service, it needs to be repositioned without passengers for various logistical reasons, which is accurately captured by the term "deadheading." Other terms in the choices do not accurately reflect this specific operation or are not commonly recognized in the context of public transportation.