Females Exposed to Low Levels of Androgens Before Birth Show

Females exposed to low levels of androgens before birth show tomboyish behavior in childhood and then return to more feminine interests and gender characteristics during adolescence, while many girls who are highly feminine in childhood become more tomboyish in adolescence as they seek to explore the social power that comes with more masculine gender roles. These two cases make it clear that

A) prenatal hormones are exclusively responsible for determining one's adult gender identity.
B) later social factors are exclusively responsible for determining one's adult gender identity.
C) both prenatal hormones and later social factors contribute in determining one's adult gender identity.
D) only one's genetic predisposition ultimately determines one's adult gender identity.