Which of These Is a Similarity Between a Monopolist That

Multiple Choice

Which of these is a similarity between a monopolist that does not practice price discrimination and a perfectly competitive firm?

A) The firms face the same amount of competition from new entrants into the market.
B) The firms have an equal number of rivals.
C) The firms face perfectly price-elastic demand curves.
D) Price equals marginal revenue at all output rates for both types of firms.
E) Price equals average revenue at all output rates for both types of firms.