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The patient's blood pressure is 170/90 mm Hg, pulse is 110 beats/min, respiratory rate is 22 breaths/min and labored, and oxygen saturation is 75%. Auscultation of his lung sounds reveals coarse crackles bilaterally. What should you do? A. Ventilate him with a bag-mask device. B. Begin treatment with continuous positive airway pressure (CPAP). C. Position him supine and transport. D. Administer oxygen via nasal cannula.
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