Market structure with many producers supplying an identical product; prices set by supply and demand?

• A. Perfect competition
• B. Market structure
• C. Equilibrium quantity
• D. Monopoly

Answer: (A)

Perfect competition is the market arrangement where many producers supply an identical product, and no single seller can influence the price. Because each firm takes the market price as given, the price is determined by the overall interaction of supply and demand in the market. The equilibrium price is where quantities supplied and demanded match, and the corresponding quantity is the equilibrium quantity. This setup—many price-taking producers and a homogeneous product—explains why prices are set by market forces rather than by any single firm.

The other options don’t fit as well. A market structure is a broader idea, not a specific pricing mechanism. An equilibrium quantity is the outcome at the equilibrium price, not the description of how prices are set. A monopoly describes a market with a single seller that can influence price, which contradicts the scenario of many producers.