The owners of all the child care centers in a town are trying to set up a cartel to raise the price of child care services. Which scenario will INCREASE the likelihood that the cartel will fail because of cheating by one or more of the owners? a) All of the child care centers face the same costs. b) There are only a few childcare centers. c) The child care centers are at capacity. d) The child care centers vary in terms of the services they provide.