Why is a control group important? A. It changes all the time, allowing us to see if the experimental group stays the same.
B. It is used to see if the experimental group causes a change.

A. It changes all the time, allowing us to see if the experimental group stays the same.

control group mean the thing the stay the same during the Experiment.

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The correct answer is:

It is used to see if the experimental group causes a change.

Explanation:

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