[Expert Solution]: An investigator wants to better understand…

An investigator wants to better understand why nurses may be more or less likely to pursue a certification in holistic nursing. What would be the most efficient study design to answer this question? a) Randomized control trial comparing nurses who are exposed to literature promoting holistic certification to those who are not. Researchers follow-up 90 days later to determine who has applied for certification. b) Cohort study: enroll nurses without certification, collect information on baseline characteristics and follow up with them in 5 years to see if they have become certified c) Cross-sectional survey assessing experience, knowledge and attitudes and whether the nurse currently has a holistic certification