After Spinal Anesthesia, What Is the Highest Priority Action of the Nurse

After spinal anesthesia, what is the highest priority action of the nurse?

A) Elevate the head of the bed immediately when the client returns from surgery.
B) Ambulate the client as soon as possible to aid in the excretion of the spinal anesthetic.
C) Have the client change positions hourly to increase the spinal fluid loss.
D) Instruct the client to remain flat for 6 to 8 hours to decrease the loss of spinal fluid.