Studies show that as people age, the time spent on sports will gradually decrease, and the time spent on television will gradually increase. And in the next 20 years, the proportion of the elderly in the urban population will increase significantly. The company should sell the shares of "Tengda Sports Shoes" company in time and increase its investment in television companies. Which of the following is not a prerequisite for making the above reasoning? ['The increase in the number of people watching TV can increase the revenue of TV companies.', 'The average person reduces exercise time, and their demand for sports shoes will also decrease.', 'Most people participate in sports must wear sports shoes.', "The development trend of ordinary people's sports and leisure habits will not change significantly in 20 years."]