A researcher has developed a new instrument to more accurately measure anxiety in older individuals post-retirement. Based on their pilot study data analysis, the scale is divided into 3 sub-scales based on three unique themes; anxiety about the future; freedom, and; staying within a comfort zone. The researcher has administered the measure to another cohort of older individuals but struggled to get a large N. In writing the manuscript for publication, they need to demonstrate that their instrument is a consistent measure of anxiety in the target population. What would be the most appropriate statistical technique to provide that information? Question 26Select one: a. Exploratory Factor Analysis (EFA) on the second sample b. Compare both cohorts with test-retest reliability analysis c. Combine both samples for reliability analysis with Cronbach's Alpha d. Regression analysis comparing the new cohort with the previous data