A Woman, 46-Year-Old, Visits the Office for Follow-Up

A woman, 46-year-old, visits the office for follow-up. For aggressive follicular thyroid carcinoma with distant metastases, the patient underwent a complete thyroidectomy followed by radioactive iodine ablation six months ago. Levothyroxine was provided to her after surgery to stop the progression of thyroid cancer. Despite having a regular appetite, the patient has unintentionally lost 4.5 kg (10 lb) of weight during the last four months. She's also extraordinarily warm and perspiration-prone. Blood pressure is 150/70 mm Hg, heart rate is 110 bpm, and respirations are 17 /minute. The temperature is 37 C (98.6 F) . A little hand tremor and sweaty hands are visible upon examination. Which of the following would a serum thyroid function test likely show?

A) A
B) B
C) C
D) D
E) E
F) F