13. In order for a market to support superstars, it must have which of the following characteristics?

a. It must be involved in professional athletics.

b. Every customer must want the good supplied by the best producer, and the technology must exist for the best producer to supply every customer at low cost.

c. Every customer must be willing to pay an enormous amount for the product, and the product must be a necessity.

d. Every customer must be indifferent to the price they pay, and the seller must be a competitor in the market for the product.