Which of the following is true regarding the production and pricing decisions of monopolistically competitive firms? Monopolistically competitive firms choose the quantity at which marginal cost equals ?

• A. marginal revenue and then use the demand curve to determine the price consistent with this quantity
• B. average total cost and then use the supply curve to determine the price consistent with this quantity
• C. marginal revenue and then use the supply curve to determine the price consistent with this quantity
• D. average total cost and then use the demand curve to determine the price consistent with this quantity