Answer: b cell phone carriers
Step-by-step explanation:
In the United States, cell carrier services are often considered to be a part of an oligopoly. However, apart from cell services, the oligopolist structure has several other industries. While oligopolies may seem similar to a perfect competition economic structure, where consumers have multiple choices for a similar product, and producers or sellers are bound by consumer choices and the prices set by consumers themselves, oligopolies consist of certain large companies and industries dominating the market. These companies overshadow the sale and performance of several smaller companies, due to a number of reasons.