Research on Sexual Orientation-One's Preference for Sexual Partners of the Same

Research on sexual orientation-one's preference for sexual partners of the same or opposite sex-suggests that sexual orientation is:

A) a choice, one best explained as a choice about identity and relationships.
B) a choice, one best explained by exposure to admired role models.
C) not a choice, as best explained by a dominant mother and a weak father.
D) not a choice, as best explained by genetics and prenatal hormonal influences.