**Core Concept**
The liver is divided into anatomical segments based on its vascular and biliary supply. The liver receives its blood supply from the hepatic artery and portal vein, while its bile is drained through the bile duct. The division of liver segments is crucial for various surgical procedures, including liver resections.

**Why the Correct Answer is Right**
The hepatic veins are responsible for draining the blood from the liver into the inferior vena cava. However, the hepatic veins do not divide the liver into separate segments. Instead, they serve as a common drainage pathway for the entire liver. The liver is divided into segments based on the distribution of the hepatic artery and portal vein, which supply oxygenated blood and nutrients, respectively. These segments are known as Couinaud's liver segments, which are numbered from 1 to 8.

**Why Each Wrong Option is Incorrect**
* **Option A:** The hepatic artery does indeed divide the liver into segments, as it branches into smaller arteries that supply each segment.
* **Option C:** The portal vein also divides the liver into segments, as it branches into smaller veins that supply each segment with nutrient-rich blood.
* **Option D:** The bile duct also plays a role in dividing the liver into segments, as it branches into smaller ducts that drain bile from each segment.

**Clinical Pearl / High-Yield Fact**
It is essential to remember that the liver is divided into segments based on its vascular supply, and not its venous drainage. This is crucial for surgeons to perform liver resections safely and effectively.

**✓ Correct Answer:** B. Hepatic vein