After discharge following a procedure, patients may not remember verbal instructions given preoperatively. What should you do to facilitate postoperative compliance with instructions? 

A. repeat instructions several times during the preoperative office visit
B. cancel surgery until the patient can repeat instructions correctly
C. provide written instructions and tell the patient to call the office if she has additional questions
D. document understanding in the medical record

C. provide written instructions and tell the patient to call the office if she has additional questions