If the U.S. Congress imposes a quota on imports of Japanese cars due to claims of "unfair" trade practices, and Japanese demand for American exports increases at the same time, then, in the long run ________, everything else held constant.
选项：

A: the Japanese yen will appreciate relative to the U.S. dollar
B: the Japanese yen will depreciate relative to the U.S. dollar
C: the Japanese yen will either appreciate, depreciate or remain constant against the U.S. dollar
D: there will be no effect on the Japanese yen relative to the U.S. dollar