What Can a Fluctuation in Exchange Rates Result In

What can a fluctuation in exchange rates result in?

A) a country employing additional tariffs and quotas on imports to manage fluctuations
B) a nation's currency becoming more or less valuable compared with those of other nations
C) the possibility of an economy reaching short-run equilibrium at levels below or above full employment
D) a relatively rapid economic growth and periods of relative stagnation or decline