34. Which of the following statements is correct? a. If oligopolists successfully collude, then their combined output will be equal to the output that would be observed if the market were a monopoly. b. Although the logic of self-interest decreases a oligpoly’s price below the monopoly price, it does not push the duopolists to reach the competitive price. c. Although the logic of self-interest increases a oligopoly’s level of output above the monopoly level, it does not push the oligopolists to reach the competitive level. d. All of the above are correct.