After using various conventional advertising and promotion methods, the online sales revenue of an e-commerce company has not improved as expected. For this reason, management has heavily hired professionals to conduct market analysis. The analysis report proposed that mobile payment ( It usually refers to those who use smartphones to pay for goods or services they consume). This is the real potential customer group of e-commerce. So the management decided to cooperate with a large commercial bank to open the new mobile payment function. Publicity and promotion were carried out in China, but after one month, the effect was not satisfactory, and online sales revenue did not increase significantly. If the following _____ items are true, the above results can best be explained. ['As the security of transactions is questioned, the number of people who have recently opened mobile payment features has decreased.', 'Dry mobile payment is an emerging business, and consumers are more cautious about it.', 'Generally speaking, it takes a period of time for people who have newly opened mobile payment functions to make such online shopping.', 'Online shopping is more popular among white-collar workers, but they prefer e-commerce to provide some unique services.']