Which of the following statements about price and marginal cost in competitive and monopolized markets is true ?

A. In competitive markets, price equals marginal cost, in monopolized markets price exceeds marginal cost.
B. In competitive markets price equals marginal cost, in monopolized markets price equals marginal cost
C. In competitive markets price exceeds marginal cost, in monopolized markets price exceeds marginal cost
D. In competitive markets price exceeds marginal cost in monopolized markets price equals marginal cost

Which of the follow statements about price discrimination is not true ?

A. Perfect price discrimination generates a deadweight loss
B. Price discrimination can raise economic welfare.
C. price discrimination requires that seller be able to separate buyers according to their willingness to pay.
D. Price discrimination increases a monopolist’s profits.
E. For a monopolist to engage in price discrimination buyers must be unable to engage in arbitrage.