The Reason a Monopoly Imposes a Deadweight Loss on Society

The reason a monopoly imposes a deadweight loss on society is that

A) there is a gain in profitability to firms that would have been in the industry had there been no monopoly.
B) the government is concerned about the negative impact of a monopoly on consumers.
C) consumers are denied output for which they are willing to pay more than the cost of producing it.
D) antitrust litigation is a large expense for government budgets to finance.