40 POINTS
 Andy compares mattresses. A twin-sized NightSoft mattress at the large chain BuyRite costs $1,500. The BuyRite saleswoman tells Andy that the company's 24-hour customer service, free mattress cleaning, and 60-day return policies are the best in the business.
 A similar twin-sized model, the DarkNights mattress, at the small store Joe's Bed and Linens, costs $1,495. The salesman at Joe's tells Andy that this store offers a 30-day money-back guarantee, plus free delivery.
 Which of these is Andy experiencing?
 A.)Non-price competition in a monopolistically competitive market
 B.)Non-price competition in a purely competitive market
 C.)Price competition in a monopolistically competitive market
 D.)Price competition in a purely competitive market