If a bookstore receives discounts from publishers, it will profitably sell books at below-market prices. A bookstore that caters to mass tastes or has exclusive access to a large specialized market will have a high sales volume. A bookstore that not only caters to mass tastes but also has exclusive access to a large specialized market cannot profitably sell books at below-market prices. A bookstore that profitably sells books at below-market prices gets discounts from publishers.
The only way that bookstores can profitably sell books at below-market prices is to get the books at a discount from publishers. Unless bookstores generate a high sales volume, however, they cannot get discounts from publishers. To generate such volume, bookstores must either cater to mass tastes or have exclusive access to a large specialized market, such as medical textbooks, or both.
Which one of the following can be properly inferred from the passage?