Answer:
The correct option is;
Loss of national monetary and exchange rate policy
Step-by-step explanation:
The disadvantages of the establishment of monetary unions includes;
1) The loss of independence in monetary policy
2) The associated problems that arise due to the the initial establishment of the union
3) Tedious nature of the task of attaining comprehensive capital mobility
The advantages are;
1) Lack of uncertainty in exchange rate variation
2) Reduced cost of doing business
3) Improved fiscal stability as well as control of the inflation rate by supranational central bank.