Answer: Option (C). Validity
Explanation: Validity is the degree to which a variable, test, questionnaire or instrument measures the theoretical concept that the researcher hopes to measure. validity is an indication of how sound your research is. More specifically, validity applies to both the design and the methods of your research. Validity in data collection means that your findings truly represent the phenomenon you are claiming to measure.
Furthermore, Validity referred to the extent to which the scores from a measure represent the variable they are intended to. When a measure has good test-retest reliability and internal consistency, researchers should be more confident that the scores represent what they are supposed to. In other to assess whether a study has construct validity, a research consumer should ask whether the study has adequately measured the key concepts in the study.
