Anthony is considering opening a small business in a monopolistically competitive industry. Which of the following is a true statement about profit-maximizing, that Anthony should consider before opening the new business? Select one: a. Monopolistically competitive firms cannot be guaranteed an economic profit in any period and might incur losses. b. Monopolistically competitive firms are guaranteed an economic profit in the short run. c. Monopolistically competitive firms produce only those goods for which they can acquire a barrier to entry, such as a patent d. Monopolistically competitive firms necessarily earn long-run economic profits