The nurse is caring for a client with suspected infectious endocarditis. Which information obtained in the health history could contribute to the development of this problem?

A. Periodontal disease and recent gum surgery can introduce bacteria into the bloodstream, increasing the risk of infective endocarditis. B. Breast cancer treatment affects immunity but is not a direct risk factor for endocarditis. C. Diabetes increases infection risk generally but is less directly linked to endocarditis. D. A past myocardial infarction is not a typical risk factor for infectious endocarditis.