Here are the PPF tables for the United States and for Japan. Currently both are at point B and B*. After they each specialize in production, what is the number range of wheat and rice that can be traded so that both countries are necessarily better off? U.S. Possible Wheat and Rice Production United States Wheat Rice A 120 0 B 60 25 C 0 50 Japan Possible Wheat and Rice Production Japan Wheat Rice A 0 100 B 40 50 C 80 0 Group of answer choices U.S. trades 0-120 wheat to Japan for 0-100 rice from Japan. U.S. trades 40-60 wheat to Japan for 25-50 rice from Japan. U.S. trades 25-50 wheat to Japan for 40-80 rice from Japan. U.S. trades 30-90 wheat to Japan for 25-75 rice from Japan.What are fixed exchange rates? Group of answer choices When two countries do not allow buying and selling of their currencies with the other country. When two counties maintain an unchanged exchange rate between them over time. When the value of one currency in terms of the other is 0. When two countries allow a free market to set the exchange rate between them