Under oligopoly, there are 0 so many firms that no one can control the price. 0 identical products. 0 low barriers to entry. 0 high barriers to entry. Question 41 (1 point) Under monopolistic competition, there are 0 high barriers to entry. 0 low barriers to entry. 0 so many firms that no one can control the price. 0 identical products. The firm's supply curve is their 0 marginal cost curve above the minimum of ATC. O the entire marginal cost curve. 0 marginal cost curve above the minimum of AVC. O the upward sloping portion of the marginal cost curve. The key difference(s) between monopoly and oligopoly is 0 there are no barriers to entry with oligopoly. 0 there are no differences between oligopoly and a monopoly. O that there are two in oligopoly rather than one competitor in a monopoly. 0 there must be product differences in oligopoly. The key differencels) between perfect competition and monopolistic competition is 0 there is poor information about prices in perfect competition. 0 there is poor information about prices in monopolistic competition. 0 the products sold are slightly different in monopolistic competition. 0 the products sold are slightly different in perfect competition. When firms are in perfect competition, the result is that firms charge a price that is always equal to its AFC. minimum ATC. minimum AVC. MC