An oligopoly arises when have all or most of the sales in an industry. If oligopolists with the same marginal costs and no fixed costs compete against each other in price, it leads to all firms . b. If oligopolists cooperate, they can act as resulting in . c. Which factors have the potential to develop an oligopolistic market? low costs of entry the granting of a limited number of patents identical products high economies of scale d. Which situations would most likely result in an oligopolistic market? retail clothing market market for apples locally regulated water market local market for internet services