Which of the following accurakiy describes a rnonopolistcally competitive market? O Barners to entry or Oxit secure firms' long-torm economic profits. O An individual firm's demand curve is perfectly elastic. Firms will earn normal profit in long-run equilibrium, C) Production is inemciont in the short run and omciont in the long run. C) Firms will produco moro and charge less than firms in perfect competition.