Edmond's diet consists mostly of hamburgers, french fries, and other fast food items. He does not exercise often and lives a sedentary life. Edmond's family has a history of heart disease. Both of his parents had heart attacks during their 70s, and his grandparents also had heart attacks during their later years. Edmond has a heart attack at 45. Which of the following likely contributed to his heart attack?

I. genetics
II. nutrition
III. lifestyle

A. I only
B. I, II, and III
C. I and III only
D. II only