Question: solve Part A: This study was (2 Observational ' Experimental Part B: Was the experiment controlled? One group received no treatment, so it was the

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Part A: This study was (2 Observational ' Experimental Part B: Was the experiment controlled? One group received no treatment, so it was the control group. ( One group received a placebo, so it was the control group. () There was no control group. Part C: Write a conclusion that is appropriate to this kind of study

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