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Auditore Auditore
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6 years ago
Social smiles typically first appear at
A) birth.
B) 2 months of age.
C) 6 months of age.
D) 18 months of age.
Textbook 
Children: A Chronological Approach, Canadian Edition

Children: A Chronological Approach, Canadian Edition


Edition: 5th
Authors:
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wrote...
6 years ago
B) 2 months of age.
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