Which of the Following Statements Regarding Gender Roles and Culture

Which of the following statements regarding gender roles and culture is FALSE?

A) Adult personality and gender identity are closely tied to cultural definitions of "masculinity" and "femininity."
B) Gender roles of the Tchambuli people of New Guinea are a nearly perfect reversal of North American stereotypes.
C) In many cultures, women do the heavy work because men are considered too weak for it.
D) In Russia, as in the Unites States, roughly 75 percent of all medical doctors are men.