Bandura was able to determine that the behavior was observed from the model rather than typical play associated with the toy because:

a. all children played with the Bobo doll in a generally aggressive way.
b. children playing with the Bobo doll used the exact phrases and actions as did the adult model.
c. only children not exposed to the adult model played with the Bobo doll in an aggressive way.
d. none of the children played with the Bobo doll.

b