Research Studying Adolescent Friendship Networks Over a 1-Year Period Has

Research studying adolescent friendship networks over a 1-year period has found all of the following, except:

A) more than half of the adolescents in any given school are members of cliques.
B) girls are more likely than boys to be members of cliques.
C) boys are more likely than girls to be considered "isolates."
D) adolescents' positions in their schools' social network are relatively stable over time.