Which of the Following Is TRUE for Both Monopoly and a Perfectly

Multiple Choice

Which of the following is TRUE for both monopoly and a perfectly competitive firm?

A) The demand for the individual firm's product is perfectly elastic.
B) Economic profits can be sustained indefinitely over time.
C) The marginal revenue curve is horizontal at the market equilibrium price.
D) Profits are maximized by producing at the level of output where marginal revenue is equal to marginal cost.