[单选题]8. 在不断增加粮食生产的基础上，河南省的农民正在进一步发展多种经济。
AOn the basis of steadily developing grain production, farmers in Henan Province are further diversifying their economy.
BBased on steadily developing grain production, farmers in Henan Province are further diversifying their economy.
CAs steadily developing grain production, farmers in Henan Province are further expanding their diversified economy.
DLike steadily developing grain production, farmers in Henan Province are further expanding their diversified economy.
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