8.Competitive firms differ from monopolies in which of the following ways?(i)Competitive firms do not have to worry about the price effect lowering their total revenue.(ii)Marginal revenue for a competitive firm equals price, while marginal revenue for a monopoly is greater than the price it is able to charge.(iii)Monopolies must lower their price in order to sell more of their product, while competitive firms do not.
(A) (i) and (ii)
(B) (ii) and (iii)
(C) (i) and (iii)
(D) all of the above