A nurse is teaching a client who takes warfarin daily. Which of the following statements by the client indicates a need for further teaching?

A. Taking warfarin at the same time every day is good practice to maintain consistent blood levels and effectiveness. B. It is important to check the INR regularly, and a check every three weeks is generally acceptable as long as it falls within the recommended therapeutic range. C. Eating green vegetables, which contain vitamin K, can interfere with warfarin’s effectiveness, but it does not necessarily indicate a problem if the intake is consistent. D. Ginger root can increase the risk of bleeding, especially when taken with warfarin, and should be avoided unless approved by a healthcare provider.