Kung Girls and Boys Engage in Rough-And-Tumble Play

Kung girls and boys engage in rough-and-tumble play. Among the Pilaga Indians, girls are matched against the boys. Rough-and-tumble play is less common among girls in the United States. These examples demonstrate that

A) the tendency to participate in rough-and-tumble play is genetic.
B) children from lower socioeconomic status groups are more likely to engage in it.
C) this type of play is influenced by culture and environment.
D) it is a form of play that is new to the United States.