A hardware store generally sells roughly equal numbers of Maxlast brand hammers and Styron brand hammers. Last week, all of the Maxlast hammers were put on sale and placed in a display case just inside the store entrance while the Styron hammers retained their usual price and location. Surprisingly, the Styron hammers slightly outsold the Maxlast hammers. Which one of the following, if true, does most to explain the surprising result? ['Customers who bought the Maxlast hammers last week commonly mentioned the sale as their reason for buying a hammer at that time.', 'The hardware store circulated flyers that publicized the sale prices on Maxlast hammers.', "For the first several seconds after shoppers enter a store, they do not take detailed notice of the store's merchandise.", 'In general, a single item that is on sale will not motivate shoppers to make a special trip to a store.']