A 42-year-old female patient is scheduled for transsphenoidal hypophysectomy to treat a pituitary adenoma. During preoperative teaching, the nurse instructs the patient about the need to
a. cough and deep breathe every 2 hours postoperatively.
b. remain on bed rest for the first 48 hours after the surgery.
c. avoid brushing teeth for at least 10 days after the surgery.
d. be positioned flat with sandbags at the head postoperatively.