A patient diagnosed with depersonalization disorder tells the nurse, "It's starting again. I feel as though I'm going to float away." Which intervention would be most appropriate at this point?

A) Notify the health care provider of this change in the patient's behavior.
B) Engage the patient in a physical activity such as exercise.
C) Isolate the patient until the sensation has diminished.
D) Administer a prn dose of antianxiety medication.