A new genetically engineered papaya was produced not by seed companies who have been motivated by profit, which was the case with most genetically modified crops previously approved for commercial use, but university and United States Department of Agriculture researchers who allowed growers to use it free of charge.
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Aproduced not by seed companies who have been motivated by profit, which was the case with most genetically modified crops previously approved for commercial use, but
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Bproduced not by profit-motivated seed companies, the case with most genetically modified crops previously approved for commercial use, but
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Cproduced not by profit-motivated seed companies, as was the case with most genetically modified crops previously approved for commercial use, but by
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Dnot produced by profit-motivated seed companies, which was the case with most genetically modified crops previously approved for commercial use, but was produced by
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Enot produced by seed companies who have been motivated by profit, the case with most genetically modified crops previously approved for commercial use, but by
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正确答案: C