Which Best Describes a Child's Understanding of Ethnic and Racial

Which best describes a child's understanding of ethnic and racial identity in middle childhood?

A) Children do not yet have the cognitive capabilities to understand differences in ethnicity and race.
B) Biracial children have an easier time understanding their ethnicity and race.
C) Children develop an understanding of racial identity in middle childhood but not ethnic identity.
D) Children understand that their ethnic and racial identities are stable, and will always remain with them.
E) It is not until adolescence that children develop a sense of ethnic and racial identity.