Mary Adams Takes Care of Several Toddlers and Preschoolers While

Mary Adams takes care of several toddlers and preschoolers while their parents work during the day. One warm spring day, she has the children in a fenced-in area behind her home. A large dog comes running up to the fence. As the dog approaches, 2-year-old Todd looks at Mary. When he sees that she appears frightened, he immediately starts to cry. What phenomenon is Todd displaying in this situation?

A) zone of proximal development
B) social referencing
C) accommodation
D) assimilation