Assume a certain firm in a competitive market is producingQ= 1,000 units of output. AtQ= 1,000, the firm's marginal cost equals $15 and its average total cost equals $11. The firm sells its output for $12 per unit.

To maximize its profit, the firm should

a) shut down

b)continue to produce 1,00 units

c)decrease its output, but continue to produce

d) increase its output