K Does the market system result in productive efficiency? In the long run, perfect competition OA. does not result in productive efficiency because price-taking firms produce where price equals marginal cost OB. results in productive efficiency because every good or service is produced up to the point where the last unit provides a marginal benefit to consu OC. results in productive efficiency because production represents consumer preferences OD. does not result in productive efficiency because barriers to entry result in firms making a profit. OE. results in productive efficiency because firms enter and exit until they break even where price equals minimum average cost