Bandura's (1965) Classic Study on the Observational Learning of Aggressive

Bandura's (1965) classic study on the observational learning of aggressive responses is important because it indicated that

A) learning new responses is possible without the learner having to first perform them
B) learning can occur without reinforcement
C) reinforcement has a major effect on one's willingness to perform learned responses
D) learning can occur without reinforcement and reinforcement has a major effect on one's willingness to perform learned responses
E) all of the above