The Historical Progress of the HIV Infection Began to Be

The historical progress of the HIV infection began to be tracked in 1979. Arrange the historical events in sequence of their discovery. (Separate letters by a comma and space as follows: A, B, C, D)
A) Infection in heterosexual men and women
B) Infection in hemophiliacs
C) Infection in injection drug users
D) Increased incidence of Kaposi carcinoma in young homosexual men
E) Increased incidence of Pneumocystis jiroveci (previously PCP)