Sexual Differences Were Strongly Emphasized in 19^th-Century America Because

Sexual differences were strongly emphasized in 19^th-century America because

A) frontier life necessitated these distinctions.
B) men were regarded as morally superior beings.
C) it was the duty of men to teach the young how to be good, productive citizens.
D) the market economy increasingly separated men and women into distinct economic roles.
E) women believed this emphasis brought them greater respect.