The cell-phone market can be considered a(n) ________ because ________.
◦ oligopoly; there are large profits for the firms that dominate the market
◦ monopoly; Apple makes the largest profit in the market
◦ monopolistically competitive market; the few firms make a profit and produce a variety of phones
◦ oligopoly; there are few barriers to entry
◦ monopolistically competitive market; the firms charge a markup over marginal cost