In the Featured Study on Babbling in the Manual Mode

In the Featured Study on Babbling in the Manual Mode, Petitto and Marentette examined the development of language production in deaf infants. When comparing deaf infants to hearing infants, what did the researchers find?

A) Deaf infants and hearing infants both used hand gestures, but only deaf infants routinely used hand gestures that were related to ASL.
B) Hearing infants also demonstrated the capacity for learning ASL, and in some cases did more manual babbling than the deaf infants.
C) Deaf infants made just as much noise as hearing infants.
D) It was impossible to tell the difference between deaf and hearing infants, because they behaved identically.