Foreign households and foreign firms demand U. S. dollars in exchange for foreign currency for all of the​ following, except A. when currency traders want dollars because they expect that the value of the dollar in the future to be greater than its current value. B. when U. S. firms and households want foreign currencies so that they can buy goods and services produced in those foreign countries. C. when foreign firms and households want dollars so that they can buy goods and services produced in the United States. D. when foreign firms and households want to invest in the United States either through foreign direct investment or through foreign portfolio investment.