Assume a perfectly competitive firm is currently producing 100 units of output. Its marginal cost is $6 and rising at the output quantity. Its average variable cost is $7 and its average fixed cost is $3. If the product's price is $6, which of the following will the firm do in the short run to maximize its profit?

Answer Options:

a. Produce more than 100 units of output

b. Increase its price above $6

c. Shut Down

d. Continue to produce at exactly 100 units of output

e. Produce, but less than 100 units of output