Several Studies Have Shown That Individuals Who Later Identify as Homosexual

Several studies have shown that individuals who later identify as homosexual begin showing gender nonconformity in behavior at age three or four. What does this suggest about the influences on sexual orientation?

A) Sexual orientation is solely determined by biology.
B) Sexual orientation is influenced by early childhood experiences.
C) Sexual orientation is influenced by adolescent sexual experiences.
D) Sexual orientation is influenced by the prenatal environment.