he research antagonistic to ex-post facto research is
| A. | experimental studies |
| B. | normative researches |
| C. | library researches |
| D. | all of the above |
Answer : A Explanation : Studies opposite to ex-post facto are experimental ones where various causes are first presented and their effects due to manipulation of the single variable are seen |
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Option: A Explanation : Explanation will come here. Explanation will come here. Explanation will come here. Explanation will come here. Explanation will come here. |
