Which events could cause the change in supply shown on this graph? Check all that apply.
A producer goes out of business.
O A new company joins the marketplace.
A natural disaster causes production to drop.
O A company begins to produce more goods.

When used-car dealers signal the quality of a used car with a warranty, a. buyers believe the signal because the cost of a false signal is high b. it is not rational to believe the signal because some used-car dealers are crooked c. the demand for lemons is eliminated d. the price of a lemon rises above the price of a good used car because warranty costs on lemons are greater than warranty costs on good used cars