What type of investigation allows the control of variables

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asked Oct 16, 2017 103k views

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Dundo · Answer 1 · 2017-10-22T02:33:33+0000

an experimental investigation allows the controls of variables, all the time. however, a comparative investigation can sometimes allow the control of variables. but the answer you're looking for is experimental investigation.

What type of investigation allows the control of variables

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