A 45-year-old man with a history of hepatitis C-related cirrhosis presents to the emergency department with acute dyspnea and hemoptysis that began 6 hours ago. He reports no fever, cough, or recent sick contacts. Vital signs: BP 92/58 mmHg, HR 118 bpm, RR 28/min, SpO2 78% on room air, temperature 37.2°C. Physical examination reveals crackles in bilateral lung bases and splenomegaly. Laboratory studies show INR 3.2, platelet count 45,000/μL, and hemoglobin 9.2 g/dL. Chest X-ray demonstrates bilateral interstitial infiltrates with a ground-glass appearance. Blood cultures are negative. Which of the following viral infections is most likely responsible for this patient's acute pulmonary hemorrhage and respiratory compromise?

1. A)Respiratory syncytial virus with secondary bacterial superinfection
2. B)Influenza A virus with acute respiratory distress syndrome
3. C)Cytomegalovirus pneumonitis with alveolar hemorrhageGABARITO
4. D)Hepatitis A virus with acute liver failure
5. E)Measles virus with giant cell pneumonia