Dr Mannisto Is a Behaviourist Who Is Studying the Causes

Dr. Mannisto is a behaviourist who is studying the causes of excessive violence among some hockey players. She is likely to consider whether:

A) the more aggressive players have experienced brain injuries.
B) there is a reward for players who engage in excessive violence.
C) the more aggressive players experienced emotional abuse in childhood.
D) the cultural values and rules have shaped hockey players to become more violent than in the past.