Which of the Following Statements Concerning Gender Constancy and Gender

Which of the following statements concerning gender constancy and gender identity is true?

A) Gender identity and gender constancy both appear when a child is about 2 to 3 years old.
B) Gender identity and gender constancy both appear when a child is about 6 to 7 years old.
C) Gender identity usually develops several years before gender constancy.
D) Gender constancy usually develops several years before gender identity.