Figure 1010 Depicts the Cost and Revenue Curves for a Monopolist

Multiple Choice

Figure 10.10 depicts the cost and revenue curves for a monopolist.

-Refer to Figure 10.10 to answer this question.At the profit-maximizing level of output,what is the amount of total costs?

A) $20.
B) $600.
C) $900.
D) $1,200.
E) Cannot be determined from this information.