A Patient Who Has Undergone Valve Replacement Surgery Is Being $\mathrm{K}$

A patient who has undergone valve replacement surgery is being prepared for discharge home. Because the patient will be discharged with a prescription for warfarin (Coumadin) , the nurse should educate the patient about which of the following?

A) The need for regularly scheduled testing of the patients International Normalized Ratio (INR)
B) The need to learn to sleep in a semi-Fowlers position for the first 6 to 8 weeks to prevent emboli
C) The need to avoid foods that contain vitamin $\mathrm{K}$
D) The need to take enteric-coated ASA on a daily basis