Caroline, the store manager at a jewelry store, conducts statewide market research and collects data on customer preferences toward various jewelry items. Based on her findings, she has to recommend the items customers are more likely to buy and the items the store should promote more so that profits can be maximized. In this case, Caroline will be performing the _____ of marketing research. a. diagnostic role b. descriptive role c. prescriptive role d. prescriptive role