When the US dollar appreciates, which of the following is most likely to result? O a. U.S. goods exported aboard will cost less in foreign countries, and so foreigners will buy more of them. O b. U.S. goods exported aboard will cost more in foreign countries and so foreigners will buy more of them. OC. U.S. goods exported abroad will cost more in foreign countries, and so foreigners will buy fewer of them. O d. Americans will purchase fewer foreign goods