The Problem with Monopolies Is Their Ability to Do Which

The problem with monopolies is their ability to do which of the following? (i) profiteer at the expense of consumers
(ii) price their product at a level that forces consumers to pay more than they are willing or able
(iii) restrict output below the socially efficient level of production

A) (i) and (iii)
B) (ii) and (iii)
C) (iii) only
D) (i) , (ii) and (iii)