Currency unions are rare because
a. they're to no one's advantage.
b. having flexible exchange rates has the same benefits and none of the costs.
c. speculative attacks are likely to occur.
d. countries are reluctant to give up having their own currencies.
Answer: D
If the answers is incorrect or not given, you can answer the above question in the comment box. If the answers is incorrect or not given, you can answer the above question in the comment box.