<span>Coins were developed as a medium of exchange
because they are easy and more convenient in negotiating and purchasing. For
example, the British pound, the yen, and the euro are examples of currencies.
It is letter A. Currencies are the money used in a certain country in their
everyday purchase of goods inside the country. When a person goes to other
country and exchange his or her money for another money that can be used inside
the country he is now currently in, then that is exchanging rates. Tariffs are the taxes payed by a certain
company of exporting or importing industry to transport it from one place or
country to another country.</span>
