A good in the U.S. costs $20. The same good costs 150 pesos in Mexico. If the nominal exchange rate is 10 pesos per dollar, what is the real exchange rate? Select one: O a, 4/3 so the good is more expensive in the U.S. O b. 4/3 so the good is more expensive in Mexico. O c. 3/4 so the good is more expensive in the U.S. O d. 3/4 so the good is more expensive in Mexico