In a study of the relationship between socio-economic class and unethical behavior, 129 University of California undergraduates at Berkeley were asked to identify themselves as having low or high social-class by comparing thmeselves to others with the most (least) money. most(least) education, and most(least) respected jobs. They were also presented with a jar of individually wrapped candy and informed that the candy were for children in a nearby laboratory, but that they could take some if they wanted. After completing some unrelated tasks, participants reported the number of candies they had taken. It was found that those who were identified as upper-class took more candy than others. For the study, identify:

a) the cases

b)The variables, and their types

c) the main research question