Disposable personal income is equal to personal income minus personal tax payments

Hurricane Katrina damaged a large portion of oil refining and pipeline capacity in the Gulf coast states. In the market for gasoline,

A) the demand curve shifted to the left resulting in a decrease in the equilibrium price. B) the demand curve shifted to the right resulting in an increase in the equilibrium price. C) the supply curve shifted to the left resulting in an increase in the equilibrium price. D) the supply curve shifted to the right resulting in an increase in the equilibrium price.

Protectionism may reduce imports, and it will also

a. appreciate the dollar, reducing exports. b. appreciate the dollar, increasing exports. c. depreciate the dollar, increasing exports. d. depreciate the dollar, reducing exports.