Which of These Was NOT Suggested as an Explanation for Gender

Which of these was NOT suggested as an explanation for gender differences in the epidemiology of AIDS?

A) Because women are often economically subordinate to men, they are less able to protect themselves from HIV.
B) HIV is found in higher concentrations in vaginal and cervical secretions than in ejaculate.
C) On average, HIV levels in women are about half that of men with similar lymphocyte counts.
D) Women progress to AIDS at a lower overall viral load than men.