The Actual Deadweight Loss from Monopoly in the United States

The actual deadweight loss from monopoly in the United States is likely to be greater than the calculated estimates because some _____

A) monopolies experience strong economies of scale.
B) monopolists spend resources to secure and maintain their monopoly.
C) monopolists often keep price lower than their profit-maximizing level in order to increase barriers to entry.
D) monopolists' markets are contestable.
E) monopolists' prices and profits are regulated by the government.