The Nurse Has Provided Instruction to a Patient Recently Prescribed

The nurse has provided instruction to a patient recently prescribed warfarin (Coumadin) .Which statement by the patient indicates to the nurse the need for further teaching?

A) "I will always wear a medical alert bracelet."
B) "I will check with my healthcare provider before I take any OTC medications."
C) "I will be careful when I use a knife or other sharp objects."
D) "I will rinse my mouth with mouthwash instead of brushing my teeth."