In the Absence of Government Regulation

In the absence of government regulation:

A) a monopoly firm can indefinitely sustain greater than normal profits.
B) a monopoly firm can sustain only normal profits.
C) a monopoly firm will not, even in the short run, sustain a loss.
D) a monopoly firm will not, even in the short run, be forced into a temporary shut down situation.
E) if a monopoly firm remains in business over the long run, it can not be expected to have at least normal profits.