A 40-year-old man was hospitalized with a closed bone fracture in his left lower leg and died on the third day of the hospitalization. Autopsy of the body reveals deep vein thrombosis in the left lower leg. The lumina of the pulmonary artery branches are obstructed by red masses. What complication has caused the patient’s death?

• A. Tissue embolism
• B. Air embolism
• C. Foreign body embolism
• D. Pulmonary thromboembolism
• E. Gas embolism