In what situation would a patient require the use of fresh frozen plasma?

Fresh frozen plasma (FFP) is a critical component of the blood that contains clotting factors and proteins necessary for proper hemostasis. When a patient presents with significant coagulopathy—an impaired ability to form blood clots—FFP is used to restore the necessary clotting factors quickly. This situation can arise in various clinical scenarios, such as severe liver disease, massive transfusion protocols where dilutional coagulopathy occurs, or conditions like disseminated intravascular coagulation (DIC).

The use of FFP is specifically indicated when there is a clear need to correct coagulopathy. This is why option B is the correct answer; it addresses the requirement for clotting factors to help the patient achieve stability and prevent excessive bleeding.

Other options mention situations like treating anemia or hydrating a patient, which typically do not require FFP, as anemia is often treated with red blood cell transfusions and hydration can often be managed with crystalloids or other fluids. Decreasing blood viscosity is not a primary use of FFP; instead, it focuses on addressing the underlying issues related to coagulation factors and their functions. Therefore, B is the most appropriate choice given the specific context of requiring clotting factors.