The hypothesis of an experiment is: if people listen to classical music as they fall asleep; they will sleep for longer periods of time. Designing an experiment to test a hypothesis requires creative thinking. How could an experiment be designed to test the hypothesis described above? A) collect data on sleep duration time B) place a group in a quiet room as they go to sleep C) place a group in a room playing classical music as they go to sleep D) place a control group in a quiet room as they go to sleep, place an experimental group in a room with classical music playing as they go to sleep, and collect sleep duration data from each group
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