You are planning a health education on chronic illnesses for a group of seniors in the community. When deciding upon which illnesses to focus upon, you know that which of the following are the most common diseases in the United States? (Select all that apply.)

A. Osteoarthritis: Osteoarthritis is one of the most prevalent chronic diseases among older adults in the United States. It causes joint pain, stiffness, and functional limitation, significantly affecting mobility and quality of life in the senior population. B. Diabetes: Diabetes mellitus, particularly type 2, is highly common among older adults due to age-related metabolic changes and lifestyle factors. It is a major cause of cardiovascular disease, kidney failure, and neuropathy, making it a key focus for community health education. C. Asthma: Asthma is more common in children and younger adults than in the older population. Although it can persist or develop later in life, it is not among the leading chronic diseases affecting seniors in the United States. D. Heart disease: Heart disease remains the leading cause of death and disability among adults in the United States. Education on prevention and management, including lifestyle modification and medication adherence, is essential for promoting cardiovascular health in seniors. E. Cancer: Cancer incidence increases with age, making it a major chronic condition among older adults. Teaching about early detection, regular screening, and symptom awareness helps improve outcomes and supports timely intervention.