A patient who has been anticoagulated with warfarin (Coumadin) has been admitted for gastrointestinal bleeding. The history and physical examination indicates that the patient may have taken too much warfarin. The nurse anticipates that the patient will receive which antidote?

A. Vitamin K is the antidote for warfarin overdose, as it helps to reverse the anticoagulant effects of warfarin. B. Potassium chloride is used to treat hypokalemia, not to reverse anticoagulation. C. Protamine sulfate is the antidote for heparin, not warfarin. D. Vitamin E does not have a role in reversing warfarin toxicity.