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The only type of investigation that involves a control group is collective. comparative. descriptive. experimental.

The only type of investigation that involves a control group is collective. comparative. descriptive. experimental.
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The only type of investigation that involves a control group is collective. comparative. descriptive. experimental.

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User Matthew Kemnetz
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1 Answer

5 votes

Answer:

Experimental

Step-by-step explanation:

Like all experiments, Experimental investigations also need a control group.

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User Aasukisuki
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