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Which statement about control Ed experiments is correct?

A. Controlled experiments test more than one variable at a time.

B. Controlled experiments do not contain and experimental group.

C. Controlled Experiments are rarely used anymore

D. Controlled Experiments test only one variable

User Krakover
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1 Answer

3 votes
A.Controlled Experiment test more than one variable at a time
User Minatverma
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