When Planning a Trip to Spain, Brett and His Wife

When planning a trip to Spain, Brett and his wife, both Americans, were concerned about how much they could afford to spend in Europe because sometimes the U.S. dollar will buy more goods and sometimes it will buy less, based on changing economic conditions. The ________ rate is the rate at which the currency of one area or country can be exchanged for the currency of another's.

A) fluctuation
B) dividend
C) exchange
D) transaction
E) international