**Core Concept**
Pringle's maneuver is a surgical technique used to control bleeding from the liver by temporarily occluding the hepatoduodenal ligament, which contains the hepatic artery and portal vein. This ligament is responsible for supplying blood to the liver, and by compressing it, blood flow to the liver is interrupted, allowing for the liver to be isolated from the rest of the circulation.

**Why the Correct Answer is Right**
The mechanism behind Pringle's maneuver involves the temporary occlusion of the hepatoduodenal ligament, which contains the hepatic artery and portal vein. This compression effectively interrupts blood flow to the liver, allowing the surgeon to control bleeding from the liver. The hepatic artery and portal vein are responsible for supplying oxygenated blood and nutrient-rich blood to the liver, respectively. By compressing these vessels, the liver is isolated from the rest of the circulation, allowing for more controlled surgical procedures.

**Why Each Wrong Option is Incorrect**
**Option A:** Pringle's maneuver is not primarily used to control bleeding from the spleen. The spleen receives its blood supply from the splenic artery, which is not affected by Pringle's maneuver.
**Option B:** Pringle's maneuver is not used to control bleeding from the kidneys. The kidneys receive their blood supply from the renal arteries, which are not interrupted by this technique.
**Option C:** Pringle's maneuver is not used to control bleeding from the pancreas. The pancreas receives its blood supply from the pancreatic arteries, which are not affected by this technique.

**Clinical Pearl / High-Yield Fact**
Pringle's maneuver is a classic example of a temporary occlusion technique used to control bleeding in abdominal surgery. It is particularly useful in liver surgery, where controlling bleeding is critical to ensure patient safety.

**Correct Answer: C. Liver