C has a lot of good friends in the class. A elderly people tend to look pretty much alike. D the bystander effect. B experience less distress at the sight of other children fighting on the school playground. D catharsis hypothesis.
B are irresponsible and unmotivated.
C were so endangered by their role-playing experience that the study was discontinued. C factory workers who are each paid on the basis of the number of bicycles each assembles individually 25. C social roles.