Which of the Following Is True

Which of the following is true?

A) In an oligopoly market, the equilibrium price is higher than the competitive equilibrium price.
B) In a monopoly market, the equilibrium price in the long run approaches the competitive equilibrium price.
C) In a monopolistically competitive market, the long-run equilibrium price is higher than the competitive equilibrium price.
D) In an oligopoly with differentiated products, the equilibrium prices of the firms are the same.