Final answer:
The correct answer is B) Each maximizes profits by producing a quantity for which marginal revenue equals marginal cost.
Step-by-step explanation:
The correct answer is B) Each maximizes profits by producing a quantity for which marginal revenue equals marginal cost.
A perfectly competitive firm and a monopoly differ in terms of pricing and output decisions. A perfectly competitive firm acts as a price taker, producing at a quantity where marginal cost equals market price. On the other hand, a monopoly firm maximizes profits by producing a quantity where marginal revenue equals marginal cost.