单选题：According to the author，which of the following most interest

题目分类：理工类
题目类型：单选题
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题目内容：

According to the author，which of the following most interested the researchers? A．The mice that started dieting in old age．
B．27 of those 46 0ld genes that continued to behave like young genes．
C．Calorie restriction that works in people．
D．Dieting that makes sure a drug is effective．

参考答案：

答案解析：

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