You are answering a USMLE-style medical question. Question: A 40-year-old female presents to your office complaining of a tender neck and general lethargy. Upon further questioning, she reports decreased appetite, fatigue, constipation, and jaw pain. Her pulse is 60 bpm and her blood pressure is 130/110 mm Hg. Biopsy of her thyroid reveals granulomatous inflammation and multinucleate giant cells surrounding fragmented colloid. Which of the following likely precipitated the patient’s condition: Options: A) Iodine deficiency B) Thryoglossal duct cyst C) Infection D) Chronic renal disease Reply with ONLY the letter of the correct answer (A, B, C, or D). No explanation.