What Does Margaret Mead's Research on Three Tribes Living in New

What does Margaret Mead's research on three tribes living in New Guinea before World War II demonstrate about gender?

A) Gender is universal. In other words, men are masculine and women are feminine regardless of culture or geography.
B) Biological sex is a more important factor than gender.
C) New categories of gender were created to explain sex variation.
D) Different tribes had different gender roles, and some may not fit neatly into the Western categorization of gender.