Mandy, a 9-month-old infant, saw a little girl in a toy store pushing buttons on a musical toy that plays a different song for each button. When Mandy's grandmother gave the same toy to her the following day, Mandy immediately started pushing the buttons. In the context of infants' cognitive development, Mandy was most likely displayingA. categorization.
B. deferred imitation.
C. object permanence.
D. dishabituation.