A Patient Who Has Type 2 Diabetes Mellitus Takes Metformin

A patient who has type 2 diabetes mellitus takes metformin (Glucophage) .The patient tells the primary care NP that he will have surgery in a few weeks.The NP should recommend:

A) taking the metformin dose as usual the morning of surgery.
B) using insulin during the perioperative and postoperative periods.
C) that the patient stop taking metformin several days before surgery.
D) adding a sulfonylurea medication until recovery from surgery is complete.