If the Brazilian demand for American exports rises at the same time that U.S. productivity falls relative to Brazilian productivity, then, in the long run, ________, everything else held constant.
A. the Brazilian real will appreciate relative to the U.S. dollar
B. the Brazilian real will depreciate relative to the U.S. dollar
C. the Brazilian real could appreciate, depreciate, or remain constant relative to the U.S. dollar
D. there is no effect on the Brazilian real relative to the U.S. dollar