Which of the following statements is true​?
A. Because the demand curve for a monopolistically competitive firm is downwardminussloping its marginal revenue will be negative.
B. The marginal revenue of a monopolistically competitive firm will be always be positive.
C. The marginal revenue of a monopolistically competitive firm will be positive at high prices and negative at low prices.
D. The marginal revenue of a monopolistically competitive firm will be positive at low prices and negative at high prices.

Q&A Education