In the US, Boys and Girls Are Expected to Learn Two Entirely

In the U.S., boys and girls are expected to learn two entirely different sets of norms,

A) With girls more likely than boys to rigidly follow their stereotyped norms.
B) With the differences increasing over time.
C) Although in recent years the norms for girls have become even more rigid.
D) however recently girls have found it easier than boys to reject this polarization.