Bike sharing, as a new thing, has developed rapidly recently. The shadow of bike-sharing can be seen almost everywhere in the streets and streets of the city. Bike-sharing constitutes a new beautiful landscape of the city and also provides convenience for people. Citizens are worried about the entire bicycle production industry. They believe that the emergence and large-scale use of shared bicycles have made many individuals who plan to buy bicycles no longer buy. Therefore, the entire bicycle industry's production and sales volume have decreased. Which of the following, if true, would most undermine the conclusions of these citizens. ['Bicycle manufacturers of different brands will face more intense market competition. Some manufacturers will cooperate with bike-sharing companies to produce and sell more bicycles.', 'There are also many problems with shared bicycles. For example, there are hidden safety hazards and they cannot be found in time when there is a demand. Some people are still willing to buy their own bicycles.', 'Bicycle sharing is produced by a bicycle manufacturer commissioned by the company that owns the bicycle-sharing, and the number of bicycle-sharing far exceeds the purchase amount due to personal needs.', 'The use of shared bicycles requires an online account application, and WeChat scanning is required when using them. Many middle-aged people do not go online, so they are more willing to buy bicycles by themselves.']