There is an "elderly mode" in Redmi's mobile phone, which is an innovation forced by user feedback in the forum. "The earliest we heard a lot of users complained that the elderly did not dare to use smartphones because the Android system was too complicated and left the elderly at a loss. Technical personnel focuses on the research and development of products on these issues. The current Redmi mobile phone 'elderly mode' removes all information aggregation, mainly based on a card-like interface, and arranges functions such as text messages, phone calls, news, and photos that the elderly will use. On the desktop, the response is very good. ". Which of the following statements confirms the above case? ['"What the market needs should be determined by consumers, not companies. ".', '"Users don\'t know what they want until you put the product in front of them".', '"In a fully competitive market, innovation can upend everything".', '"When buying, you can use any language; but when selling, you must use the buyer\'s language. ".']