please answer 3 will rate positive aslong as correct and i want to verify if 1 is a?

1. When the exchange rate for the euro changes from $1.00 to $1.20 then, holding everything else constant, the euro has a) appreciated and German cars sold in the United States become more expensive. b) appreciated and German cars sold in the United States become less expensive. c) depreciated and American wheat sold in Germany becomes more expensive. d) depreciated and American wheat sold in Germany becomes less expensive. 2. The exchange rate between U.S. dollar and Japanese Yen is $.008442/Y en. How much would a $10 bottle of Califomia wine cost in Japan? It would cost 1184.553 yen 3. How does China's treasury peg the value of RMB (Yuan) to U.S. dollar? Explain the process