Answer:
oligopoly
Explanation:
In an oligopoly market structure, a small number of companies control all or most of the market. In this case, the top 10 brewers in the US control 97.04% of the total beer market. In an oligopoly, no single company controls the market. in this case, even though Anheuser-Busch has a 54.76% share of the market, competition still exists with the other companies.