Farmers markets, street food vendors, and the market for unskilled labor compete in perfect competition. On the other hand, the markets for cosmetics, restaurants, and beverages are examples of monopolistic competition. A monopsony has only one buyer for a particular good or service, giving that buyer significant power in determining the price of the products produced. The State Airports Authority, the Turkish State Railways and the local water supplier are examples of monopolies. Oligopoly is a market structure in which a few large firms compete. Computers, aircraft manufacturing, the automobile industry and agro-businesses are examples of oligopolistic markets. The correct answer is E.