ECONOMICSCompared to a monopolistically competitive industry, an oligopoly has A. a higher Herfindahl - Hirschman Index, fewer firms, and more barriers to entry. B. a higher Herfindahl-Hirschman Index, more firms, and more barriers to entry. C. a higher Herfindahl-Hirschman Index, fewer firms, and fewer barriers to entry. D. a lower Herfindahl -Hirschman Index, fewer firms, and more barriers to entry. E. a lower Herfindahl-Hirschman Index, more firms, and more barriers to entry .