As people grow older, their material needs gradually decrease, and their spiritual needs increase. Therefore, in order to meet the growing spiritual needs, the elderly should participate in cultural and sports activities more actively than when they are young. Which of the following, if true, best supports the above conclusion? ['As society progresses, older people have more spiritual needs than young people.', 'The lives of older people who are more active in cultural and physical activities than when they were young.', 'The material life of some elderly people is not rich.', 'Elderly people do not have more mental needs than young people.']