Governments and legislatures can erect barriers to entry. Which of the following would NOT be one of them?

The above figure shows the market for gasoline. When a hurricane destroys a major refinery that refines oil into gasoline, the

A) demand curve for gasoline shifts from D1 to D2 and the supply curve of gasoline does not shift. B) demand curve for gasoline shifts from D1 to D2 and the supply curve of gasoline shifts from S2 to S1. C) demand curve for gasoline does not shift, and the supply curve of gasoline shifts from S2 to S1. D) demand curve for gasoline does not shift, and the supply curve of gasoline shifts from S1 to S2.

The aggregate demand curve shows the ________ relationship between the price level and ________

A) positive; the quantity of real GDP demanded B) negative; aggregate labor demanded C) positive; aggregate labor demand D) negative; the quantity of real GDP demanded