Many nursing homes have prohibitions against having pets, and these should be lifted. The presence of an animal companion can yield health benefits by reducing a person' s stress. A pet can also make one' s time at a home more rewarding, which will be important to more people as the average life span of our population increases. Which one of the following most accurately expresses the conclusion drawn in the argument above? ['Residents of nursing homes should enjoy the same rewarding aspects of life as anyone else.', 'The benefits older people derive from having pets need to be recognized, especially as the average life span increases.', 'As the average life span increases, it will be important to more people that life in nursing homes be rewarding.', 'The policy that many nursing homes have should be changed so that residents are allowed to have pets.']