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An essential requirement for an experimental design(in order to establish cause and effect)is: A. more than one dependent variable B. random assignment into a control

An essential requirement for an experimental design(in order to establish cause and effect)is:

	A.	more than one dependent variable
	B.	random assignment into a control and treatment group
	C.	a theory to support the hypothesis
	D.	participants who have given informed consent to participate

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