Which one of the following is the most effective measure to control the transmission and prevalence of HIV/AIDS? A: Control the source of infection, and adopt centralized management of diagnosed AIDS patients and asymptomatic carriers of HIV B: Cut off the transmissions, such as prohibiting drug abuses and sexual promiscuities, block mother-to-infant transmission and check blood products rigorously C: Forbid HIV-infected people getting married D: Inject HIV vaccine E: Treat HIV patients