Observations of Junior High School Children Show What Patterns

Observations of junior high school children show what patterns?

A) Children segregate themselves according to gender but pay little attention to ethnicity in forming groups.
B) Children segregate themselves according to ethnicity but pay little attention to gender in forming groups.
C) Children segregate themselves according to both gender and ethnicity in forming groups.
D) Children use neither gender nor ethnicity in forming groups, but socialize with children with similar interests.