Imagine an HIV-Prevention Campaign Created in North America for Citizens

Imagine an HIV-prevention campaign created in North America for citizens of Namibia, Africa, urging them: "Be faithful to your spouse to prevent the spread of sexually transmitted diseases." The problem with such a message is that:

A) The campaign is largely wasted because citizens of Namibia already have the lowest incidence of HIV and AIDS on the planet.
B) It makes it sound as if HIV is transmitted through contact between people involved in long-term relationships, which is rarely the case.
C) It presupposes that the citizens of Namibia define marriage and fidelity in the same way that the campaign creators do.
D) All of the above