Which of the following increases the equilibrium price of a used car and decreases the equilibrium quantity?

A) an announcement by the U.S. Attorney General that the windows on older cars were made with cheaper glass that can explode at high speeds
B) new federal legislation that raises the legal driving age to twenty-four in all states
C) a new fee that used car dealers must pay to the government on all sales of used cars
D) all of the above because each is consistent with the "law of demand"

C