8. Which of the following statements is correct?
(A) If duopolists 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 duopoly'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 duopoly's level of output above the monopoly level, it does not push the duopolists to reach the competitive level.
(D) All of the above are correct.