Studies of interactions involving toddlers indicate all of the following except

a. groups of unacquainted peers behave differently with one another than do groups of peers who are well acquainted
b. toddlers who know each other well may exhibit unexpectedly advanced activities when playing together
c. very young children should be credited with the capacity to form true friendships
d. very young children's friendships are different from older children's friendships because they possess companionship but lack mutual affection and intimacy

D