**Core Concept**
Obstruction of the Inferior Vena Cava (IVC) is a critical condition that can lead to severe consequences due to the impaired return of deoxygenated blood from the lower body to the heart. The IVC plays a vital role in draining blood from the lower extremities, abdomen, and pelvic organs into the right atrium.

**Why the Correct Answer is Right**
Obstruction of the IVC can lead to a significant increase in venous pressure in the lower body, causing peripheral edema, ascites, and potentially life-threatening complications. The liver, being a major organ drained by the IVC, can become congested, leading to liver enlargement and dysfunction. The obstruction can also cause a decrease in cardiac output due to the reduced return of blood to the heart.

**Why Each Wrong Option is Incorrect**
* **Option A:** This option is incorrect as it does not accurately describe the consequences of IVC obstruction.
* **Option B:** This option is incorrect as it is not a direct consequence of IVC obstruction.
* **Option D:** This option is incorrect as it is not a primary effect of IVC obstruction.

**Clinical Pearl / High-Yield Fact**
In cases of IVC obstruction, the liver may become enlarged and congested, leading to a condition known as hepatic congestion or hepatic hydrothorax. This is a critical clinical correlation that students should remember.

**Correct Answer:** C. Liver enlargement and dysfunction due to hepatic congestion.