Question 21
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Sean is 9 months old and he loves playing Peek-A-Boo with his dad. He loves this game so much because he knows that when his dad hides behind the pillow, that his dad is not gone forever and, rather, his dad will appear
again. This task that babies must master, cognitively, is called
Oa. cephalocaudal development
Ob. sensory motor development
Oc. object permanence
Od. contact comfort