Which of These Is NOT a Reason Discussed in the Text

Which of these is NOT a reason discussed in the text for why there are gender differences in behavior?

A) Being told that a behavior is appropriate for one's gender makes a child more likely to engage in that behavior.
B) Children are more likely to model the behavior of same-sex adults.
C) Nearly all behaviors have biologically rooted gender differences.
D) People learn what behaviors are appropriate for their gender from their culture.