Which statement best summarizes the role of supply and demand in setting prices for goods?

A. Prices are set by finding a balance between the high prices sellers prefer and the low prices buyers prefer.
B. Prices are set by sellers creating a large supply of a product and then determining how much demand exists.
C. Prices are set by adding up the total supply and demand of a product and converting it to a dollar amount.
D. Prices are set by identifying the demand for a product at a certain price and convincing buyers to pay a little more.