In a competitive market, which factor will function to equalize the quantity demanded by consumers and the quantity supplied by producers?

• A. Demand
• B. Price
• C. Supply
• D. Interest rate

Answer: (C)

Price is the balancing mechanism in a competitive market. The quantity buyers want to purchase (demand) and the quantity sellers are willing to offer (supply) both depend on price. When demand would exceed supply at the current price, prices rise, encouraging more production and reducing purchases until the two quantities match. When supply would exceed demand, prices fall, increasing purchases and reducing production until the quantities align. The equilibrium quantity occurs where the two are equal, and price moves to bring about that balance. Demand describes buyers' intent, supply describes sellers' willingness, and the interest rate isn’t the direct mechanism that clears this market.