You are answering a USMLE-style medical question. Question: A 38-year-old woman undergoes a partial thyroidectomy for an enlarged thyroid gland compressing the trachea. During surgery, a young surgeon ligates the inferior thyroid arteries as close to the poles as possible to prevent intraoperative hemorrhage. 2 weeks later, the patient presents to the outpatient clinic with hoarseness. What could be the most likely cause of her hoarseness? Options: A) Internal laryngeal nerve injury B) Recurrent laryngeal nerve injury C) External laryngeal nerve injury D) Laryngeal edema Reply with ONLY the letter of the correct answer (A, B, C, or D). No explanation.