Which of the following best describes the substitution effect of a price decrease? The price of new cars decreases, so Raja postpones buying a new car. The price of pizzas decreases, so Lucy switches from buying hamburgers to buying more pizzas. Mortgage interest rates decrease, so Rhonda decides to rent an apartment instead of buying a house. The price of Exxon gasoline decreases, so Samuel switches from buying Exxon gas to buying more BP gas