You are answering a USMLE-style medical question. Question: A 25-year-old man presents to the emergency department with altered mental status. He was found down in the middle of the street. His past medical history is unknown. His temperature is 99.0°F (37.2°C), blood pressure is 104/64 mmHg, pulse is 70/min, respirations are 5/min, and oxygen saturation is 91% on room air. The patient is being resuscitated in the trauma bay. Which of the following was most likely to be found on exam? Options: A) Ataxia B) Conjunctival injection C) Miosis D) Nystagmus Reply with ONLY the letter of the correct answer (A, B, C, or D). No explanation.