One Reason a Country Would Be Better Off Fixing Its

One reason a country would be better off fixing its exchange rate is if:

A) it has a strong reputation for controlling inflation on its own.
B) it lacks ample foreign exchange reserves.
C) it is well-integrated with the economy of the country to whose currency its currency is fixed.
D) its own macroeconomic characteristics are inversely correlated with the macroeconomic characteristics of the country to whose currency its currency is fixed.