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OpenStudy (anonymous):

A scientist wants to learn if a new drug works. Why would a controlled experiment be an appropriate type of scientific investigation? A. It allows the scientist to build a model of the environment. B. It allows the scientist to experiment without a hypothesis. C. It allows the scientist to test how one particular thing works. D. It allows the scientist to simulate the effects of the drug.

OpenStudy (aaronq):

It allows the scientist to test how one particular thing works.

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