A nurse is caring for a client who received a transfusion of 250 mL of packed RBCs. The nurse should identify that which of the following findings indicates the client is responding positively to the transfusion?

Rationale: A. The client's lung sounds remain clear during the transfusion: Clear lung sounds indicate the absence of fluid overload or pulmonary complications, which is a safety indicator, but it does not reflect the effectiveness of the transfusion in improving oxygen-carrying capacity. B. The client's blood pressure increases to 140/85 mm Hg following the transfusion: A sudden rise in blood pressure could indicate fluid overload or a transfusion reaction, not necessarily a positive response to the transfusion. C. The client's hemoglobin level increases following the transfusion: An increase in hemoglobin indicates that the transfused red blood cells have effectively raised the client’s oxygen-carrying capacity, demonstrating a positive therapeutic response. D. The client is afebrile during the transfusion: Remaining afebrile indicates the absence of a febrile transfusion reaction, which is a safety measure, but it does not show that the transfusion achieved its therapeutic goal.