Exhibit 9-4 Demand and Cost Curves for a Monopolist

Exhibit 9-4 Demand and cost curves for a monopolist
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As shown in Exhibit 9-4, in order to maximize its profit (or minimize its loss) , how much output should the monopoly produce?

A) 2 units per hour.
B) 4 units per hour.
C) 6 units per hour.
D) 8 units per hour.