The Fact That Babies Can Be Classically Conditioned Means That

The fact that babies can be classically conditioned means that

A) their behavior can be shaped through the use of positive or negative reinforcement.
B) the presence of their mother or father may trigger the sense of "feeling good."
C) muscular growth and coordination can be accelerated through exercise.
D) language development can be enhanced by exposure to harmonic music sequences.
E) parents must be careful to avoid its use.