Are these competitive markets?
A. In a small town, there are two providers of broadband Internet access: a cable company and the phone company. The Internet access offered by both providers is of the same speed.
B. Several stores in the mall sell hooded sweatshirts. Each store's sweatshirts reflect the style of that particular store. Additionally, some stores use higher-quality cotton than others, which is reflected in the apparel's prices.
C. Scholastik Inc. owns the U.S. copyright to a popular book series. It is the only company with the legal right to publish books in the series in the United States.
D. Dozens of companies produce plain white socks. Consumers regard plain white socks as identical and don't care who manufactures their socks.
A. No, not many sellers
few firms dominate the broadband Internet market, they are not price takers
B. No, not an identical product
Since there is only one seller and the good is unique. Not an identical product would also be accepted.
C. No, no free entry
(Scholastik Inc. is the only legal provider of the books in the popular series, there isn't free entry into that market.)
D. Yes, meets all assumptions
The sock market is the only one of these options that is a competitive market.