The Use of Antitrust Statutes by the United States Federal

The use of antitrust statutes by the United States Federal Trade Commission and the Antitrust Division of the U.S.Department of Justice has declined over the years.Which of the following statements is the correct reason for this decrease in antitrust enforcement?

A) The increase in the number of firms over the years has reduced monopoly power in most markets.
B) The prosecution of monopoly firms leads to a decrease in total surplus.
C) The dynamic view of monopoly is increasingly being used in the policymaking arena.
D) With the spread of globalization,it is difficult to prosecute companies that operate from many different countries.