The four-firm concentration ratio equals 38.5. Part 2 The HHI equals 807,000. Part 3 The four-firm concentration ratio indicates that the market is ______ and the Herfindahl-Hirschman Index indicates that the market is ______. (Assume there are no reasons that would make the concentration measures unreliable guides.) A. a monopoly; a monopoly B. a monopoly; monopolistic competition C. monopolistic competition; monopolistic competition D. monopolistic competition; a monopoly E. probably not monopolistic competition; monopolistic competition