Research on Environmental Influences on Gender Typing Shows That

Research on environmental influences on gender typing shows that

A) girls are especially intolerant of "cross-gender" play in other girls.
B) preschoolers often engage in "cross-gender" activities at home, but rarely do so in the presence of peers.
C) when preschoolers engage in "cross-gender" activities, peers criticize them.
D) preschoolers play in mixed-gender groups more than they play in same-sex groups.