Refer to the information provided in Figure 19.1 below to answer the questions that follow. U.S. Canada Bushels of alfalfa 600 Bushels of alfalfa 200 300 200 Bushels of soybeans Bushels of soybeans Figure 19.1 Refer to Figure 19.1. The opportunity cost of producing a bushel of soybeans in the United States is O half a bushel of alfalfa. O 1 bushel of alfalfa. O 2 bushels of alfalfa. O 300 bushels of alfalfa