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单选题
Sugar manufactures have ______.
A
tried hard to make experiments on their own with sugar on humans and animals
B
invested millions of dollars in buying best names of scientists to sell sugar.
C
hoped to encounter some scientific findings about sugar.
D
tried hard to establish public relations in order to open the market for sugar.
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参考解析
解析：
从文中第七段可知，糖的生产商很早就开始动用公共关系来开拓市场，对那些能做出“满意”实验的人也给与奖赏，D项表述与原文一致。
从文中第七段可知，糖的生产商很早就开始动用公共关系来开拓市场，对那些能做出“满意”实验的人也给与奖赏，D项表述与原文一致。
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