In the United States, which type of industry is often considered part of an oligopoly?

In the United States,cell carrier services are often considered to be a part of an oligopoly

Explanation:

Cell carrier services are a brand value and imagine

small = small current large mag large current

first thing first of the answer is with technology. second thing second thing is that the big bang theory did not happened u see they say it did but what they dont realize is that like dinasures are still a round they might deny it but they and look at these 12 foot human skelteons they find lets see didnt the bible say something about giants. hope this peace.