A 59-year-old man has experienced chronic fatigue for the past 18 months. On physical examination, he is afebrile. Achest radiograph shows bilateral pulmonary edema and a prominent border on the left side of the heart. The representative gross appearance of the heart is shown. Laboratory studies show serum glucose, 74 mg/dL; total cholesterol, 189 mg/dL; total protein, 7.1 g/dL; albumin, 5.2 g/dL; creatinine, 6.1 mg/dL; and urea nitrogen, 58 mg/dL. What is the most likely diagnosis? (A) Chronic alcoholism (B) Systemic hypertension (C) Pneumoconios is (D) Hemochromatosis (E) Diabetes mellitus