challenge: What is the purpose of administering non-radioactive potassium iodide in nuclear medicine scintigraphy and therapy?
  
  A. To increase the metabolism of iobenguane (MIBG) in neural tissue tumors
  B. To prevent the uptake of hot iodide by the thyroid gland
  C. To enhance the uptake of radioiodinated compounds by the thyroid gland
  D. To promote the breakdown of iodinated fibrinogen in fibrinogen scans
  Answer: 