Some people think that in recent years, a large number of rural people have flowed into cities to work, which has caused chaos in the urban social order and a decline in public security. It can be said that allowing rural people to flow into cities is harmful and unhelpful. Therefore, we should clear out the rural population in the city and limit its employment in the city. Which of the following, if true, would best refute the above view? ['The influx of a large number of rural people has made urban roads crowded.', "The influx of rural population into the city is beneficial to both the countryside and the city; it can not only make up for the shortage of urban labour but also accelerate the development of China's rural economy and improve the quality of the rural population.", 'In fact, the main offender of many major vicious cases is rural people who work in cities.', 'Too much migrant population causes worsening urban health.']