Use these graphs to answer the next two questions. The following depict the demand and supply of U.S. dollars and the demand and supply of British pounds in the foreign currency exchange market. Graph A Price 4 (U.S. dollar S1 per British pound) $1.25 T $1.11 D D2 1.5 Quantity (trillions of British pounds) Graph B Price + British S1 pounds per U.S. dollar) 20.90 E0.80 D2 D 2.5 Quantity (trillions of U.S. dollars) An appreciation of the is shown in O a. U.S. dollar; Graph B but not Graph A O b. U.S. dollar; Graph A but not Graph B O C. British pound; both Graphs A and B O d. U.S. dollar; both Graphs A and B