what is the correct order of the different stages in the course of infectious disease

A. incubation period, period of illness, prodromal period, convalescent period

B. incubation period, prodromal period, period of illness, convalescent period

C. convalescent period, period of illness, prodromal period, incubation period

D. convalescent period, prodromal period, period of illness, incubation period