If a certain market were a monopoly, then the monopolist would maximize its profit by producing 4,000 units of output. If, instead, that market were a duopoly, then which of the following outcomes would be more likely if the duopolist successfully collude?

A. Each duopolist produces 4,000 units of output.

B. One duopolist produces 3,000 units of output and the other produces 1,500 units of output.

C. One duopolist produces 2,200 units of output and the other produces 1,800 units of output.

D. Each duopolist produces 1,500 units of output.