Which cultural practice is associated with an advance in early motor development by about 2 to 3 months?
a. Some West African mothers putting babies in holes in the ground in a sitting position.
b. Chinese mothers placing infants on beds surrounded by pillows.
c. Ache mothers from Paraguay carrying infants everywhere until they are about 3 years old.
d. Some traditional mothers wrapping infants in cloth for most of their first year.
A
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