Which of the Following Children Appears to Have a Normative

Which of the following children appears to have a normative cognitive understanding of gender?

A) Benita,who is 1 year old,knows she is a girl.
B) Bridget,who is 2 1/2 years old,says that dolls are for girls and cars are for boys.
C) Beto,who is 4 years old,says that it's okay for boys to like pink and for girls to like Superman,since everyone is different.
D) Brian,who is 5 years old,says that if he grows his hair long he will be a girl.