A third-service EMS system is one in which:

A) a public agency not affiliated with the fire department provides EMS service.
B) an EMS ambulance is housed in a fire department and is staffed by EMTs.
C) responders from a fire department assist the ambulance on every EMS call.
D) a privately owned ambulance service works in tandem with a public EMS system.

Answer: A) a public agency not affiliated with the fire department provides EMS service.