Answer:
B) supply and demand.
Step-by-step explanation:
By using the supply and demand concept, the company is able to determine the prices. Here the relationship is lies between the commodity quantity in which the producers sells at different prices and how much quantity is to be purchased by the consumers. It is an important model for determining the price. When the supply and the demand meet at a point it is known as the equilibrium point at this the quantity supplies is equivalent to the quantity demanded
hence, the option B is correct