Which Precaution(s)should the Nurse Take When Caring for a Patient

Which precaution(s) should the nurse take when caring for a patient who is being treated with radioactive iodine 131 (RAIU) ?

A) Initiate radioactive safety precautions.
B) Avoid assigning any young woman to the patient.
C) Wait 3 days after dose before assigning a pregnant nurse to care for this patient.
D) Advise visitors to sit at least 10 ft away from the patient.