Which one of the following research methods can show cause and effect

Answer;

Experiment

Explanation; Experiment is the only research method that can show cause and effect, that is demonstrate a causal relationship. Cause and effect in an experiment is demonstrated by measuring the impact of the independent variable on the dependent variable. Independent variable is the variable that is expected to produce a change. This variable is given to the experimental group and withheld from the control group. The dependent variable on the other hand is the variable influenced or expected to change because of the independent variable.