Answer:
the correct answer is D. The exchange rate for that currency changes depending on the operations of the free market
Explanation:
their is this market called Foreign Exchange market or simply known as the FOREX Market. It is the largest market in the world where trillions of dollars are exchanged daily.
the main determinant of the prices and the exchange rates of the each currency is the market supply and demand. more demand will set the rates higher while more supply will decrease the rates.
nowadays, currencies are not pegged to the gold prices and we abandoned the gold standards some time ago. so gold prices have no effect on the exchange rates now.