A Product-Market Is One

Multiple Choice

A product-market is one

A) in which exchanges are based on barter rather than money.
B) where one seller has a patent for a superior product and other firms try to imitate the leader the best they can.
C) where all of the customers want the same product but will consider a substitute if their preferred brand is not available.
D) in which competing sellers offer physically or conceptually similar products.
E) in which no intermediaries operate.