Passage Three32.A. About 1920.B. Around 1925.C. Around 1930.D. About 1935.33.A. Over 16 million.B. Over 3.5 million.C. Over 1 million.D. Over 2.5 million.34.A. Corn.B. Soybean.C. Oat.D. Rye.35.A. Corn.B. Soybean.C. Oat.D. Rye.