All of the following support the role of maturation in motor development except:

A. Infants from 1 to 7 weeks of age who practice stepping reflexes each day retain the movements and walk earlier than infants who receive no practice.
B. Babies who are swaddled walk at the same time as nonswaddled babies.
C. Identical twins share a similarity in the timing and pace of motor development.
D. Cross-cultural research finds that infants around the world display roughly the same sequence of motor milestones.


Answer: A

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