What is the purpose of using a control group in scientific experiments?A.A control group allows the researcher to practice the experiment first before actually conducting it.B.A researcher can compare the results in the experimental group and control group to determine if a single variable is causing a particular outcome in the experimental group.C.A control group provides the framework for the entire experiment so that the researcher can recall the procedures that should be conducted.D.A control group allows the researcher to conduct other experimental changes without disturbing the original experiment.E.All of the above are correct.

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