Which of the following statement is false? O a. A change from US$3/1f to US$2/1f represents an appreciation of the US dollar. O b. The exchange rate is kept the same in all parts of the market by exchange arbitrage. O c. Guyana imports of Jamaican oranges will create a demand for Jamaican dollars. O d. If all Guyanese decide to buy Germany automobiles, the Guyana dollar will appreciate relative to the German mark