If a patient is to receive an iodine contrast medium, you should ask the patient which of the following questions? 

A. "Are you allergic to eggs?"
B. "Are you allergic to chocolate?"
C. "Are you allergic to milk?"
D. "Are you allergic to shellfish?"
E. "Are you allergic to peanuts?"

D. "Are you allergic to shellfish?"
If the contrast medium contains iodine, ask the patient about allergies to iodine or shellfish, which contain iodine.