Why Is Rabies in a Human Considered as Disease in a "Dead-End

Why is rabies in a human considered as disease in a "dead-end host"?

A) The disease is transmitted by eating infected animals and cannibalism no longer occurs in humans
B) The disease is transmitted via respiratory secretions and human spread is unlikely to occur
C) The disease is transmitted sexually and intercourse among rabies-infected humans is forbidden until the patient is declared healthy
D) The disease is transmitted by saliva and human bites are unlikely to transmit the disease
E) None is a correct choice