Which statement about babbling is true?
A. For vocal babbling to fully develop, infants must be able to hear human speech.
B. Deaf infants do not start babbling until much later than hearing infants.
C. Babies with hearing impairments produce the greatest diversity of babbling sounds.
D. With age, babies coo more than they babble, in an effort to gain control over producing particular sounds.
Answer: A
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