Final answer:
The 56-year-old man with a family history of stroke has the greatest risk for developing hypertension among the individuals described due to his genetic predisposition.
Step-by-step explanation:
Among the individuals described, the 56-year-old man with a family history of stroke due to his father's early death at age 62 has the greatest risk for developing hypertension. Genetic predisposition is a significant risk factor that cannot be altered.
Although lifestyle factors are also important in the development of high blood pressure, such as physical activity in the 43-year-old man who exercises only on weekends and potentially stressful occupational conditions in the 30-year-old female advertising agent, the immediate familial history of hypertension-related cardiovascular events places the older man at the highest risk.