I-131 Is a Radioactive Form of Iodine That Is Used

Multiple Choice

I-131 is a radioactive form of iodine that is used to aid in systemic radiation of thyroid cancer. Why is I-131 used in this treatment?

A) Iodine is used by the thyroid; therefore, the radioactive form would also travel to that area.
B) Radioactive iodine will interfere with cancer cells in the thyroid and throughout the body.
C) Radioactive iodine is harmless to the patient.
D) Iodine is required for DNA replication; therefore, it would be attracted to DNA of cancerous cells.
E) Iodine is required for all cancerous cells to continue to divide; therefore, it would travel to those cells.