Connie and Andrew's Infant Son Usually Showed Little Reaction to Being

Connie and Andrew's infant son usually showed little reaction to being left with various church nursery caregivers during weekly worship services.But when he was almost 9 months old,the baby begun crying whenever his parents placed him in the arms of a nursery caregiver.The baby's crying best illustrates an emerging

A) egocentrism.
B) stranger anxiety.
C) sense of self-awareness.
D) understanding of conservation.