The correct answer is C) It is the system linking national currencies and monetary system.
What I mean by the international monetary system is "It is the system linking national currencies and monetary system."
The International Monetary System is the international institution that serves as the office to link the different currencies of the world in order to have information on currency exchanges and the value of a specific currency and its relationship with others.
The monetary system is of great help in trade, for instance. It also serves as a support for some underdeveloping countries that are suffering from harsh economic conditions in order to renegotiate their debts.