When asked by an older adult client, "What is the difference between my normal laboratory values and the ones for a 55-year-old? The nurse response is based on what understanding?

Age-adjusted ranges for older adults for all of the common laboratory findings, similar to those for infants and children.

Age-adjusted ranges only for the over 85 age-group; there are no expected changes in the 65- to 84-year-old age-group.

Age-adjusted ranges only for the hematological tests, which are due mostly to changes in the bone marrow.

No age-adjusted ranges for older adults due to the large variations within the age-group and the increasing number of factors that influence the results.