<prompt> Please answer with one of the option in the bracket. Write reasoning in between . Write answer in between .Q:A six year-old female presents for evaluation of dry skin, fatigue, sensitivity to cold and constipation. The patients mother recalls that the patient had surgery to remove a benign mass at the base of her tongue 3 months ago because of trouble swallowing. What was the likely cause of the surgically removed mass?? A: Maternal Diabetes Mellitus, B: Radiation exposure, C: Iodine deficiency, D: Failed caudal migration of the thyroid gland, E: Failed fusion of the palatine shelves with the nasal septum,  <response>: Based on the description of dry skin, fatigue, sensitivity to cold and constipation, this sounds like a case of hypothyroidism. The history of a surgically removed mass at the base of the tongue 3 months ago that was causing trouble swallowing suggests a thyroid gland issue. Among the choices, failed caudal migration of the thyroid gland during embryonic development can lead to a lingual thyroid which is an ectopic thyroid tissue at the base of the tongue. This would fit with the history provided.D: Failed caudal migration of the thyroid gland 