Which of the following is not one of the ways that antitrust laws promote competition? a. Antitrust laws allow the government to shut down a firm if the government believes the firm has monopoly power. b. Antitrust laws prevent companies from coordinating their activities in ways that make markets less competitive. c. Antitrust laws allow the government to break up big companies into smaller ones. d. Antitrust laws allow the government to prevent mergers