An Adjustable Peg Exchange Rate Regime Is Where

An adjustable peg exchange rate regime is where

A) exchange rates and interest rates are fixed for a period of time but interest rates may be devalued/revalued if a deficit/surplus becomes substantial.
B) exchange rates are fixed for a period of time but may be devalued/revalued if a deficit/surplus becomes substantial.
C) interest rates are fixed for a period of time but may be devalued/revalued if a deficit/surplus becomes substantial.
D) exchange rates are fixed at a level that equates relative prices and are moved as prices change.