【題目】 If the market price is higher than the equilibrium price.
a surplus exists and the equilibrium price will rise until it equals the market price and the surplus is eliminated.
a surplus exists and the market price will fall until it equals the equilibrium price and the surplus is eliminated.
a shortage exists and the market price will fall until it equals the equilibrium price and the shortage is eliminated.
a shortage exists and the equilibrium price will rise until it equals the market price and the shortage is eliminated.