A monetary exchange system is necessary for international trade because it A
helps governments control inflation and deflation rates.

B
allows goods to be traded between nations with different currencies.

C
allows citizens from a nation to vacation in other countries.

D
helps governments increase the efficiency of their economies.

allows goods to be traded between nations with different currencies.

Explanation:

by using  production possibilities graph.  opportunity costs are key expenses in financial matters and are utilized as a part of registering money saving advantage investigation of a venture. such expenses, be that as it may, are not recorded in the record books but rather are perceived in basic leadership by processing the money costs and their subsequent benefit or misfortune.

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