Which of the following actions should be AVOIDED to successfully convert a patient from heparin to the oral anticoagulant warfarin?
A - Discontinuing heparin without ensuring adequate anticoagulation with warfarin
B - Starting warfarin at a low dose without monitoring the INR
C - Failing to adjust the warfarin dose based on INR results
D - Initiating warfarin therapy before the patient has been stabilized on heparin