A community health nurse is preparing an educational activity on Alzheimer's disease. Which of the following risk factors should the nurse include as the greatest risk for this disease?

A. Age is the greatest and most well-established risk factor for Alzheimer's disease. The prevalence of Alzheimer’s increases significantly with advancing age, particularly after 65 years. Aging is associated with changes in brain structure and function, including accumulation of beta-amyloid plaques and neurofibrillary tangles, which contribute to cognitive decline. While genetics and other factors influence risk, age remains the most important predictor. B. Genetics can increase risk, particularly the presence of the APOE-e4 allele, but it is not as strong a predictor as age. Genetic risk factors may predispose an individual, but most cases of Alzheimer’s disease are sporadic rather than directly inherited. C. Androgen deprivation therapy has been associated with a modest increased risk of cognitive changes, but it is not a major or primary risk factor for Alzheimer’s disease. Its effect is much smaller compared with age-related risk. D. History of Down syndrome does increase the likelihood of developing Alzheimer’s disease, usually at a younger age, due to the overexpression of amyloid precursor protein on chromosome