Researchers Have Collected Data on Sexual Orientation in a Large

Researchers have collected data on sexual orientation in a large sample of adults. If sexual orientation has a genetic component, which result should they expect?

A) Fraternal twins will be more likely to share a sexual orientation than identical twins.
B) Identical twins will be more likely to share a sexual orientation than fraternal twins.
C) Adoptive parents will be more likely to share a sexual orientation with their children than biological parents.
D) Brothers will be more likely than sisters to share a sexual orientation.
E) Boys with older brothers will be more likely to be gay than firstborns.