quickly please

The beta for a firm should reflect the "discretionary nature of its products and/or services; the more discretionary a product or service is, the higher you would expect the beta to be. Given this principle, which of the following has the lowest beta? Select one: O a. High End Department store (Bergdorf Goodman) O b. Discount retailer (Walmart) O c. Grocery store (Safeway) O d. Department store (Macy's) O e. Luxury retailer (Tiffany's)