C. businessstealing externality, which harms consumers. D. businessstealing externality, which benefits consumers. Existing hotels, motels, and lodging facilities in Myrtle Beach are likely to experience what kind of externality as a result of the New VIA hotel/resort? A. productvariety b. businessstealing c. competitive d. advertising In a monopolistically competitive industry, firms” demand curves also represent a. marginal revenue. B. marginal cost. C. average revenue. D. profit.