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4. Following admission to the intensive care unit after a severe myocardial infarction, a 62-year-old woman has increasing difficulty breathing. Laboratory studies reveal a serum albumin of 4.1 mg/dL (normal > 4.0 mg/dL) and an arterial PO2 of 55 mm Hg. while a chest radiograph demonstrates a large heart and diffuse bilateral opacities, consistent with pulmonary edema. An echocardiogram is performed and demonstrates a dilated left ventricle with decreased systolic function, an enlarged left atrium, and mildly increased systolic pulmonary artery pressure. Which of the following factors most likely accounts for the development of pulmonary edema in this patient?A. Decreased arterial PO2B. Decreased colloid osmotic pressureC. Increased lymphatic drainage from the pulmonary interstitiumD. Increased pulmonary capillary hydrostatic pressureE. Recruitment and distention of the pulmonary vasculature

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