In today's society, many elderly people drift away from home to become "old drifters" in order to take care of their children and take care of the next generation. In a recent urban survey, 52.2% of the young people surveyed admitted that their parents are the old drifters, and they and their loved ones Just starting out, the work pressure is high, and there is no time to take care of children and do housework at all. According to this, experts assert that the Laosiao ethnic group in China's cities will further expand. Which of the following, if true, would best support the views of these experts? ['Older people have better medical conditions in rural areas than in rural areas.', 'Some elderly people are entangled in their homeland and are more willing to live in their hometown.', 'The implementation of the national two-child policy will promote more children to be born.', 'After the implementation of the two-child policy, the second-child birth rate in urban areas is lower than in rural areas.']