Which of the following are attributes of a monopolistic competitive market? (i) many firms competing for the same group of buyers (ii) each firm produces a product that is slightly different from the other firms (iii) in the long run, entry into the industry is restricted O A. (i), (ii), and (iii) O B. (ii) and (ii) only O C. (i) only O D. (i) and (ii) only