While Playing in the Park,Emmett and Cary Wrestle,roll,hit,and Run After

Multiple Choice

While playing in the park,Emmett and Cary wrestle,roll,hit,and run after one another.This friendly,rough-and-tumble play __________.

A) is a uniquely human social behavior
B) predicts aggressive behavior during adolescence
C) helps children form a dominance hierarchy
D) is more common among girls than among boys