The correct answer is C. Each country's economy
Explanation:
In the economy, currency exchange rates refer to the value or equivalence between the currency of different countries. For example, it is common the Euro which is used in Europe has a higher value than the Dollar used in the U.S. Additionally, currency exchange rates are not fixed because it is common the currency of countries change its value, this can be explained as economic factors within a country affect the value of the currency and therefore the currency exchange rates, these factors include demand/supply, inflation, economic growth, economic crises, among others. Thus, currency exchange rates are based on each country's economy.
