You are answering a USMLE-style medical question. Question: A 23-year-old man is brought to the emergency department 25 minutes after being involved in a high-speed motor vehicle collision in which he was the restrained driver. On questioning by the paramedics, he reported severe chest pain and mild dyspnea. On arrival, he is confused and unable to provide a history. His pulse is 93/min, respirations are 28/min, and blood pressure is 91/65 mm Hg. Pulse oximetry on room air shows an oxygen saturation of 88%. He is able to move his extremities in response to commands. He opens his eyes spontaneously. Pupils are equal and reactive to light. Examination shows multiple bruises over the trunk and extremities. There is a 3-cm (1.2-in) wound at the left fifth intercostal space at the midclavicular line. There is jugular venous distention. Decreased breath sounds and hyperresonance on percussion are noted on the left. Which of the following is the most appropriate next step in management? Options: A) CT scan of the chest B) Bronchoscopy C) Emergency thoracotomy D) Needle decompression Reply with ONLY the letter of the correct answer (A, B, C, or D). No explanation.