Final answer:
The nonmodifiable risk factors for hypertension are Age, Ethnicity, and Family History as they cannot be altered by lifestyle changes or interventions.
Step-by-step explanation:
The nonmodifiable risk factors for hypertension in a 58-year-old African-American client with a family history of hypertension and type 2 diabetes are Age, Ethnicity, and Family History. These are factors that the individual cannot change, unlike modifiable risk factors such as obesity, stress, and smoking habits, which can be managed through lifestyle changes and preventive interventions. It's important to identify these nonmodifiable risk factors, as they contribute to the individual's overall risk profile for developing hypertension.