题目内容：
根据下面资料，回答 Millions of Americans lie awake at night counting sheep, or have a stiff drink or pop an allergy pill, hoping it will make them drowsy. But experts agree all that self-medicating is a bad idea, and the causes of chronic insomnia remain mysteriou
A.unproven therapies are commonly used by people B.chronic insomnia is just a minor healthy problem C.the side effects of cognitive/behavioral therapy deserve our attention D.dietary supplements can be introduced to insomnia sufferers
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答案解析：