A Monopolist Has the Total Cost Function C(q) = 800

A monopolist has the total cost function c(q) = 800 + 8q. The inverse demand function is 80 - 6q, where prices and costs are measured in dollars. If the firm is required by law to meet demand at a price equal to its marginal costs,

A) the firm's profits will be zero.
B) the firm will lose $400.
C) the firm will make positive profit but not as much profit as it would make if it were allowed to choose its own price.
D) the firm will lose $800.
E) the firm will lose $480.