Question: Select the correct statement regarding experiments. A researcher can observe the explanatory variables but not control human responses. A researcher can carefully control the explanatory

Select the correct statement regarding experiments.

A researcher can observe the explanatory variables but not control human responses.

A researcher can carefully control the explanatory variables but not observe human responses.

A researcher can carefully control the explanatory variables and observe human responses.

A researcher can ignore explanatory variables and observe human responses.

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