What procedure would you use to ensure that experimental and control groups will be similar in most ways

Question

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Random assignment is the best procedure to ensure that experimental and control groups will be similar in most ways. This is because it eliminates bias and ensures that any differences between the groups are due to chance rather than any systematic differences. Option A and B are not relevant to the question, and option C does not provide a clear method of ensuring similarity between groups.

What Procedure Would You Use to Ensure That Experimental and Control