An Older Patient at the Clinic for an Annual Examination

An older patient at the clinic for an annual examination tells the nurse, "I don't understand why I need to have so many cancer screening tests now. I feel just fine!" The nurse will plan to teach the patient about the

A) decrease in antibody production associated with aging.
B) impact of poor nutrition on immune function in older people.
C) consequences of aging for cell-mediated immunity.
D) incidence of cancer-stimulating infections in older individuals.