You are answering a USMLE-style medical question. Question: A 52-year-old man with a history of gastric cancer that was treated with subtotal gastrectomy dies in a motor vehicle collision. At autopsy, examination of the spinal cord shows unilateral atrophy of the neurons in the area indicated by the arrow. Neurological examination of the patient when he was still alive would most likely have shown which of the following findings? Options: A) Decreased sense of temperature in the ipsilateral arm B) Decreased strength of the contralateral leg C) Decreased vibratory sense in the ipsilateral arm D) Decreased positional sense in the ipsilateral leg Reply with ONLY the letter of the correct answer (A, B, C, or D). No explanation.