The answer is B travel across physical boundaries
(A) recall any state official from his/her position
The exchange rates of a currency are responsible for the purpose of comparison of currencies of two different countries.
<h3>What is currency exchange?</h3>
The rate at which the one currency is exchanged at with another currency(s) is known as the rate of currency exchange. These currencies generally vary with a change in their countries.
Hence, option C holds true regarding the currency exchange.
Learn more about currency exchange here:
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Well since you narrowed it down for me i know now that it is B. Thank you