Which statements are true of a hospital trauma center's flow of patients?
A. If one of the hospital's trauma bays is idle when a severely injured patient arrives, that patient goes immediately into service with that hospital.
B. If all of the hospital's trauma bays are occupied when a severely injured patient arrives, that patient is placed in a queue and receives care in the emergency room until a trauma bay becomes available.
C. Customers cannot wait in this system.
D. Lost demand does not count toward the trauma