Which of the following would increase the probability that a boy will develop a homosexual orientation? A. Living in a family with one or more older sisters B. Living in a family with an older,...

Which of the following would increase the probability that a boy will develop a homosexual orientation?
A. Living in a family with one or more older sisters
B. Living in a family with an older, adopted brother
C. Having a biological older brother, even if he did not live in the same house
D. Having either an adopted or biological younger brother