Concept:Oligopsony is a market structure with few buyers but many sellers.Explanation:In this market, the number of buyers is small while the number of sellers is large.Because there are only a few buyers, the buyers have greater market power.Sellers must compete among themselves to attract these few buyers.This condition is the opposite of an oligopoly, which has few sellers.Therefore, the market described in the question is an oligopsony.Answer:D. oligopsony