A nurse is preparing a client for magnetic resonance imaging (MRI) of the heart and great vessels. Which of the following instructions should the nurse include about this test?

A. MRI uses strong magnetic fields, so clients must remove all metal objects (jewelry, hairpins, hearing aids, etc.) to prevent injury and image distortion. B. Electrodes are used in electrocardiograms (ECG/EKG), not MRIs. C. An MRI typically takes 30 to 60 minutes, sometimes longer, depending on the study. D. Fasting is not required for an MRI unless sedation or contrast dye administration is specifically ordered.