Under the gold standard of currency exchange that existed from 1879 to 1914, an ounce of gold cost $20.67 in U.S. dollars and £4.2474 in British pounds. Therefore, the exchange rate of pounds per dollar under this fixed exchange regime was: A. always changing because the price of gold was always changing B. £4.8665/$ C. unknown because there is not enough information to answer this question D. £0.2055/$