单选题：What do the Rand researchers think of many of the policy me

题目分类：英语四级
题目类型：单选题
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题目内容：

What do the Rand researchers think of many of the policy measures to control obesity? A．They should be implemented effectively．
B．They provide misleading information.
C．They are based on wrong assumptions．
D．They help people make rational choices.

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