单选题:在我国.抗虫棉的推广不仅使农民累计增收丁760亿元,而且节约了1亿公斤农药.减少了环境污染。抗虫棉的推广还完善了农业科技

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题目内容:
在我国.抗虫棉的推广不仅使农民累计增收丁760亿元,而且节约了1亿公斤农药.减少了环境污染。抗虫棉的推广还完善了农业科技服务和农民技能教育培训等体系。这表明农业科技创新
A.开辟了更为广阔的农业劳动对象
B.带来了理论创新和生产实践的深化
C.促进了人们思维方式和思想观念的转变
D.推动了人类社会生产方式的进一步发展
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