When researchers investigate cause-and-effect relationships, they usually prefer which type of approach?

Question

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Experimental approach allows researchers to manipulate an independent variable and observe the effect on the dependent variable, thus establishing cause-and-effect relationships. Nonexperimental designs do not involve manipulation of an independent variable, so causal inferences may be more difficult to draw. Meta-analysis involves combining results from multiple studies to draw conclusions but is not primarily focused on investigating cause-and-effect relationships. Therefore, the experimental approach is preferred for investigating cause-and-effect relationships.

When Researchers Investigate Cause-And-Effect Relationships, They Usually Prefer Which Type