How Do Elementary Schools Demonstrate the Important Role Gender Salience

How do elementary schools demonstrate the important role gender salience plays in institutions?

A) All aspects of school are heavily gendered,from uniforms to classroom seating to play on the playground.
B) Gender is very important in the classroom,but much less so on the playground.
C) Boys' social interactions are not influenced by gender,but girls' social interactions are.
D) Gender is very important on the playground,but less so in the classroom.