The Nurse Is Preparing a Client for Magnetic Resonance Angiography

The nurse is preparing a client for magnetic resonance angiography.Which question is a priority at this time?

A) "Have you had a recent blood transfusion?"
B) "Do you have allergies to iodine or shellfish?"
C) "Do you have a history of urinary tract infections?"
D) "Do you currently use oral contraceptives?"