What Is the Difference Between the Hepatic Portal Vein and the Hepatic

What is the difference between the hepatic portal vein and the hepatic vein, if any?

A) The hepatic portal vein empties into the inferior vena cava, and the hepatic vein empties into the liver.
B) The hepatic portal vein empties into the liver, and the hepatic vein empties into the inferior vena cava.
C) The hepatic portal vein drains the right side of the liver, and the hepatic vein drains the left side.
D) The hepatic portal vein transports oxygen-rich blood, and the hepatic vein transports oxygen-poor blood.
E) There is no difference; they are alternate names of the same vein.