Which statement best describes monopolistic competition?

• A. Many firms with product differentiation and free entry
• B. A single seller with barrier to entry
• C. Homogeneous products with some firms
• D. A cartel with fixed price

Answer: (A)

Monopolistic competition is defined by many firms, each offering a differentiated product, with free entry and exit. This combination means there are lots of choices for consumers, and each firm can charge a price a bit above marginal cost because its product is distinct enough to have its own demand. Yet because there are many near-substitute products, the market stays competitive and profits tend to zero in the long run as new firms enter when profits appear.

That’s why describing it as many firms with product differentiation and free entry fits best. The other scenarios don’t match: a single seller with barriers to entry describes a monopoly, eliminating competition; homogeneous products with only some firms points away from differentiation and implies either perfect competition or an oligopoly, but not the distinctive product variety plus easy entry; and a cartel with fixed price reflects collusion among a few firms in an oligopoly, not competitive behavior with many differentiated products.