Female Relatives of Homosexual Men Tend to Have More Offspring

Female relatives of homosexual men tend to have more offspring than other women. Which is the most reasonable conclusion to draw from this fact?

A) Homosexual behavior in men is genetic, but homosexual behavior in women is not.
B) Eventually, "gay genes" will die out because they cause their owners to engage in nonreproductive sex.
C) The gene for male homosexuality may cause hypersexuality in women.
D) Throughout human history, siblings of gay men have been expected to have extra children to make up for their brother having no children.
E) Sisters of gay men have genetically lower testosterone levels, which increases their fertility.