Which Statement Best Describes Research on Social Learning Theory

Which statement best describes research on social learning theory?

A) It found that children will copy the aggressive actions of an adult behaving violently only if they observe the behaviour in person.
B) It found that children will copy the aggressive actions of an adult behaving violently only if they observe the behaviour on film.
C) It suggests that the theory provides a useful explanation of copycat crimes.
D) It suggests that imitation is not the mechanism by which people behave in violent fashion.