A monopolistically competitive industry combines elements of both competition and monopoly. It is correct to say that the competitive element results from .....

A. a relatively large number of firms and the monopolistic element from product differentiation

B. product differentiation and the monopolistic element from high entry

C. a perfectly elastic demand curve and the monopolistic element from low barriers entry barriers

D. a highly inelastic demand curve and the monopolistic element from advertising and product promotion

E. a product homogeneous and the monopolistic element from a perfectly elastic demand curve