Which of the following is a potential benefit of Radioactive lodine (RAI) therapy in the context of thyroid cancer prevention?

A. RAI does not enhance the immune system; it works by targeting thyroid cells directly. B. RAI therapy destroys thyroid cells, including any remaining after surgery, reducing the risk of cancer recurrence. C. RAI is both diagnostic and therapeutic but is used in prevention of recurrence, not just diagnosis. D. RAI alone may not cure all thyroid cancers; it is often part of a combined treatment plan.