A client with the diagnosis of venous thromboembolism has been prescribed heparin and warfarin. Which of the following information should the nurse include in the teaching?

Choice A reason: Using a soft bristle toothbrush reduces gum bleeding risk in patients on heparin and warfarin, which increase bleeding tendency. This is a critical teaching point to minimize trauma and bleeding complications, making it the correct choice for safe anticoagulant therapy management. Choice B reason: Bruising is a side effect of anticoagulants, not an indicator of effectiveness. Excessive bruising suggests overdose, requiring monitoring, not reassurance. This is incorrect, as the nurse should teach about bleeding risks, not misinterpret bruising as a sign of therapeutic success. Choice C reason: Warfarin and heparin are not timed 2 hours apart; they are often overlapped during transition until INR is therapeutic. This is incorrect, as the nurse should teach about monitoring and overlapping therapy, not a specific timing that lacks clinical basis. Choice D reason: Dark, tarry stools indicate gastrointestinal bleeding, a serious anticoagulant complication, not an expected outcome. Patients should report this, not expect it, making this incorrect, as the nurse should teach about bleeding signs to ensure prompt intervention, not normalize them.