Which of the following is a leading cause of death among adults 65 and older?

• A. Influenza
• B. Diabetes
• C. Suicide
• D. Heart disease

Answer: (D)

The main concept here is that heart disease is the leading cause of death in adults aged 65 and older. This group has a high burden of cardiovascular conditions—such as coronary artery disease, heart failure, and related complications—driven by age-related changes and risk factors like high blood pressure, high cholesterol, smoking, diabetes, obesity, and physical inactivity. Because these conditions accumulate over time and have high mortality, they account for more deaths in older adults than other causes.

Influenza, while dangerous for seniors, does not cause as many deaths overall in this age group as heart disease. Diabetes increases the risk of heart disease but is not, by itself, the top cause of death. Suicide is a serious issue, but its mortality rate in older adults is lower than that of chronic cardiovascular disease. So heart disease stands out as the leading cause, which is why it’s the best answer.