A Nurse Is Preparing a Patient for Computed Tomography (CT)of

A nurse is preparing a patient for computed tomography (CT) of the pancreas.About 1 hour before the procedure, the nurse has the patient drink 450 mL of a dilute barium solution.Which of the following is the correct rationale for this intervention?

A) It is used to prevent nausea.
B) It is used to distinguish gastrointestinal organs from other abdominal organs.
C) It is used to sedate a patient with claustrophobia.
D) It is used to prevent an allergic reaction to the contrast medium.