Question

which situation could be the best example of an oligopoly? a new producer of power tools has entered the market and is relying on low prices to attract consumers. a new producer of a smart phone operating system is trying to enter the market but cannot because most cell phone makers use one of two popular operating systems. a new producer of running shoes is trying to enter the market but cannot because of an existing patent. a new producer of tires has entered the market and found that demand is already being met.

Explanation:

An oligopoly is a market structure with a few dominant firms. In the case of smartphone operating - systems, there are mainly two popular ones, which restricts new entrants, fitting the characteristics of an oligopoly. The other options do not represent a market with a few large firms dominating.

Answer:

A new producer of a smart phone operating system is trying to enter the market but cannot because most cell phone makers use one of two popular operating systems.