Aregional manager at gnc, a chain of retail stores selling nutritional supplements, is reviewing sales data after a recent in-store promotion. the data show success in some stores and limited response in others. the manager will probably next review the company's:.a. financial statements, to investigate current and past profits. b. brand awareness study, to assess national levels of awareness. c. implementation programs, to see if the promotion was handled consistently in the different stores. d. results for other product lines, to see how important diet products are to the firm. e. analysis of national trends in vitamins and herbal supplements, to predict future sales.