Ryan Goldstein Is a marketing researcher whose current project involves finding ways to improve drug store layouts. Ryan would like to know how often customers in a particular store actually turn left and go to the cosmetics counter to try out tester fragrances. The best method for Ryan to collect the data necessary for his project would be by observation B interviews at the cash register counters printing a link on the register receipts to survey that when completed enters customers into a drawing for a $200 gift card D conducting focus groups