Final answer:
The increased susceptibility to major illness experienced by elderly people is not evidence for the genetic clock theory of aging because it is influenced by age-related physiological changes and environmental factors.
Step-by-step explanation:
The correct answer is B) the increased susceptibility to major illness that all elderly people experience.
This is not evidence for the genetic clock theory of aging because the genetic clock theory proposes that aging is primarily influenced by genetic factors. The increased susceptibility to major illness experienced by elderly people is a result of age-related physiological changes and environmental factors, rather than specific genetic factors.
For example, as people age, their immune system becomes less efficient, making them more susceptible to infections and diseases. This weakened immune response is not solely determined by genetic factors, but also influenced by lifestyle, diet, and environmental exposures throughout a person's life.