With age, babies __________ in an effort to gain control over producing particular sounds.
A) coo more than they babble
B) increasingly babble in long strings
C) decrease their range of babbling sounds
D) make fewer consonantvowel combinations
Question 2
Baby Greer says bababababa. This is an example of __________.
A) babbling
B) cooing
C) an overextension
D) an underextension