What Is One Way to Interpret the Gender Difference in Activity

What is one way to interpret the gender difference in activity level increasing from infancy to childhood?

A) The difference is largely due to children modeling after their parents as they develop.
B) The difference increases because boys are reinforced for active behaviors more than girls, which is referred to as the gender segregation effect.
C) The difference is mainly due to boys becoming more active as they develop due to biological influences.
D) The difference becomes magnified by social interactions, which tend to be impacted by the gender segregation effect.