Select the correct answer. A farmer has been growing the same crops in his field summer and winter, year after year. Over time, the soil has lost a lot of its minerals, and the yields are reduced. Which solution would best help the farmer improve his yields? A. Divide the field into two parts, growing a variety of summer crops in one part and different winter crops in the second part. B. Divide his field into three parts, growing summer crops in the first part, winter crops in the second, and leaving the third fallow. C. Divide his field into three parts, growing winter crops in two parts and summer crops in one part. D. Leave the entire field fallow for a few years so that the soil can replenish itself.