If the exchange rate between the dollar and the euro changes from $1 5 1 euro to $2 5 1 euro, then European goods will become

a. less expensive for Americans, and imports of European goods to the United States will rise.

b. less expensive for Americans, and imports of European goods to the United States will fall.

c. more expensive for Americans, and imports of European goods to the United States will rise.

d. more expensive for Americans, and imports of European goods to the United States will fall.