A Currency Exchange Rate Is the

A currency exchange rate is the

A) price of a foreign currency,indicating how much a unit of foreign currency costs in terms of another currency.
B) rate of trade between currencies,indicating the volume and speed at which currencies are traded.
C) opportunity cost of a foreign currency,indicating the value lost by choosing one currency over another.
D) rate of currency circulation,indicating the volume and speed at which a currency circulates throughout the global economy.
E) price of a foreign currency,indicating the price of a unit of currency in terms of U.S.dollars.