Which of the following is/are true with regard to frustration aggression theory?

A. An American Psychologist, John Dollard along with his collaborators conducted research to examine frustration aggression theory.
B. Frustration-Aggression theory states that frustration leads to aggression.
C. Frustrated person demonstrate less aggression than non-frustrated people.
D. Aggression is often shown towards a weaker person who is unable to react to the aggression.
E. Situational factors are not responsible for an individual's aggression.

Choose the correct answer from the options given below:

A, B and D only

An American psychologist, John Dollard along with his collaborators, conducted research specifically to examine the frustration-aggression theory. This theory proposes that it is frustration that leads to aggression. As expected, frustrated persons did demonstrate more aggression than non-frustrated persons. Moreover, such aggression was often shown towards a weaker person who was unlikely, or unable, to react to the aggression. This phenomenon has been called displacement. Often it is observed that members of a majority group in society may be prejudiced  against members of a minority group, and may show aggressive behaviour towards a minority group member, such as using abusive language, or even physically assaulting the minority group member. This may be a case of displaced aggression arising out of frustration.

Later on, as more information was gathered about the causes of aggression, it became clear that frustration is not the only, or even a major cause of aggression. Observations showed that (i) being frustrated does not necessarily make a person aggressive, and (ii) many other situational factors may lead to aggression.