In a shopping experiment, first let shoppers look at some of their favorite items or disgusting items to change their emotions, and then show some pictures of common items to let shoppers choose among them. As a result, they found that they were affected by positive emotions. Subjects under control were able to make purchasing decisions quickly, and their decisions were less likely to be changed by other reasons. What does this text mean? ['A good mood allows shoppers to make quick, but not changeable decisions.', 'Reminders must not make customers disgusted when shopping.', 'Shoppers will quickly make a purchase decision when looking at their favorite items.', 'Shoppers with bad moods will quickly change their buying decisions.']