A nurse is assessing an older adult client who is experiencing age-related changes. Which of the following findings should the nurse expect?

A. Aging is typically associated with decreased balance due to changes in the musculoskeletal and nervous systems. B. Older adults usually experience muscle loss (sarcopenia), not an increase in muscle mass. C. This is a common age-related change due to degeneration of cartilage, reduced synovial fluid, and joint wear, leading to decreased mobility and increased stiffness. D. Aging generally leads to bone demineralization (such as in osteoporosis), making bones more brittle, not more calcified.