Summarizing His Presentation on the Origins of Homosexuality,Dennis Explains That

Summarizing his presentation on the origins of homosexuality,Dennis explains that the fraternal birth-order effect refers to the fact that

A) men who have younger brothers are somewhat more likely to be gay.
B) men who have older brothers are somewhat more likely to be gay.
C) women with older sisters are somewhat more likely to be gay.
D) women with younger sisters are somewhat more likely to be gay.