Amelia, a 6-week-old baby, lies peacefully in a crib sucking a pacifier. Her elder brother, who was sent to stay with their grandparents at the time of her birth, returns home. He walks toward the crib and calls out her name. She looks at him, stops sucking, and starts to cry. In this scenario, Amelia's reaction toward her brother best illustrates ________.
A. dishabituation
B. deferred imitation
C. operant conditioning
D. categorization
Answer: A
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