Suppose That in a Perfectly Competitive Industry, the Market Price

Suppose that in a perfectly competitive industry, the market price of the product is $6. A firm is producing the output level at which average total cost equals marginal cost, both of which are $8. Average variable cost is $4. To maximize its profits in the short run, the firm should

A) leave its output unchanged.
B) -- there is insufficient information to know.
C) reduce its output.
D) expand its output.
E) shut down.