You are answering a USMLE-style medical question. Question: A male newborn born at 27 weeks' gestation is evaluated for rapid breathing and hypoxia shortly after birth. His mother had no prenatal care. Cardiopulmonary examination shows normal heart sounds, intercostal retractions, and nasal flaring. An x-ray of the chest shows low lung volumes, air bronchograms, and diffuse ground-glass opacities. He is started on nasal continuous positive airway pressure. Further evaluation of this patient is most likely to show which of the following findings? Options: A) Bilateral pleural effusions on lung ultrasound B) Corkscrew-shaped organisms on umbilical cord culture C) Hyaline membranes lining the alveoli on lung biopsy D) Meconium-stained fluid on deep suctioning Reply with ONLY the letter of the correct answer (A, B, C, or D). No explanation.