**Core Concept**
Warfarin-induced bleeding requires urgent reversal to prevent further blood loss and potential complications. The reversal strategy involves administering a medication that counteracts the anticoagulant effects of warfarin, which is achieved by inhibiting the enzyme vitamin K epoxide reductase.

**Why the Correct Answer is Right**
Fresh frozen plasma (FFP) contains all the clotting factors, including vitamin K-dependent factors, that are inhibited by warfarin. Administering FFP rapidly replenishes these factors, thereby reversing the anticoagulant effects of warfarin and promoting hemostasis. This is particularly effective in patients with severe bleeding or those who are at high risk of bleeding.

**Why Each Wrong Option is Incorrect**
**Option A:** Vitamin K is used to reverse warfarin-induced bleeding, but it takes time to work and is not suitable for urgent reversal.
**Option B:** Tranexamic acid is an antifibrinolytic agent that can be used to prevent further bleeding, but it does not reverse the anticoagulant effects of warfarin.
**Option C:** Protamine is used to reverse heparin-induced bleeding, not warfarin-induced bleeding.

**Clinical Pearl / High-Yield Fact**
In emergency situations, the administration of FFP is often accompanied by the administration of platelets and other clotting factors to enhance hemostasis.

**Correct Answer: D. Fresh frozen plasma (FFP)**