- Which of the following situations is sufficient to represent current demand for a car? A) You've decided you want a car, and you can possibly borrow the money from a bank. B) You have enough money to buy it, and you are willing to spend the money on the car. C) You have plenty of money to buy it, but you can't decide if you want a motorcycle or a car. D) You want to buy a motorcycle and a car, and you'll have enough money for both in two years. Which of the following would cause both the equilibrium price and the equilibrium quantity to increase? A) A decrease in supply. C) An increase in demand. B) A decrease in demand. D) An increase in supply.