Which of the following was not something that several European nations did or experienced when they became members of the eurozone?A. They gave up control of their own individual monetary policy.B. They eliminated their own local currencies and adopted a single commoncurrency.C. Cross-border trade among members suffered a huge decline.D. They in essence fixed their exchange rates with one another, at a 1-to-1 peg.An avoidable cost is a sunk cost that can be eliminated (in whole or in part) as a result of choosing one alternative over another.