Jim and John Are Playmates Who Eventually Become Friends, Whereas

Jim and John are playmates who eventually become friends, whereas Jill and June are playmates who do not eventually become friends. Jim and John probably become friends because they were better than Jill and June at

A) resolving conflicts
B) communicating clearly
C) disclosing personal information to each other
D) resolving conflicts and communicating clearly
E) all of these