6. If the U.S. dollar drops to 1.2535 euros from 1.2564 euros, then the dollar has

&a. appreciated against the euro, and the prices of European cars will increase in the United States.

&b.appreciated against the euro, and the prices of European cars will decrease in the United States.

&c. depreciated against the euro, and the prices of European cars will increase in the United States.

&d.depreciated against the euro, and the prices of European cars will decrease in the United States.

&e. depreciated against the euro, and the prices of American cars will increase in Europe.