The Research on Teaching Language to Bonobos Suggests That Language

The research on teaching language to bonobos suggests that language learning is probably most successful if

A) training begins at an early age and proceeds mostly by imitation.
B) training begins at an early age and relies mostly on classical conditioning.
C) training begins at an early age and relies mostly on Skinnerian reinforcement.
D) training waits until the learner is a couple years old, and uses a variety of techniques.