Which of the Following Statements Is(are) True of Monopolies

Multiple Choice

Which of the following statements is(are) true of monopolies?
(i) they cannot make unlimited profits
(ii) they have the ability to set prices at whatever level they desire
(iii) they do not have to worry about their revenue falling if they increase the prices

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