A male newborn is delivered at 26 weeks' gestation to a healthy mother. Pulmonary function testing shows: Total lung capacity Inspiratory capacity Vital capacity Residual volume Echocardiography shows no congenital cardiac deformities. Which of the following is the most likely cause of this newborn's condition? A) Excessive pulmonary capillary hydrostatic pressure B) Excessive surfactant production C) Incompletely formed bronchioles D) Increased alveolar surface tension E) Interalveolar fibrosis

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