Which of the Following Is a Characteristic of a Commonsource

Which of the following is a characteristic of a commonsource epidemic?

A) Once the source is identified and controlled the last cases will occur approximately one incubation period later.
B) Once the source is identified and controlled there should be no additional cases.
C) The time between identification and control, and the last cases, depends on the transmission rate between sick and susceptible individuals.
D) When a common source epidemic begins, the number of cases rises slowly relative to a host-to-host epidemic.
E) When a common source epidemic ends, the number of cases falls slowly relative to a host-to-host epidemic.