The Nurse Taking the Blood Pressure of a Patient Who

The nurse taking the blood pressure of a patient who had a total thyroidectomy 2 days earlier notes that the patient's hand goes into a carpopedal spasm; the nurse recognizes this movement as an indication of:

A) Hyperkalemia, called the Allen sign
B) Hypernatremia, called the Hogan sign
C) Hypocalcemia, called the Trousseau sign
D) Hypokalemia, called the Chvostek sign