The diagram below shows how substances are transported to and from the liver. They are labeled as $D, E$ and $F$. Which one of the following labelings is correct?

• A
  $D$ is the hepatic portal vein and $E$ is the hepatic vein.
• B
  $C$ is the intestine and $F$ is the hepatic portal vein.
• C
  $D$ is the hepatic portal vein and $F$ is the hepatic vein.
• D
  $B$ is the pancreatic artery and $E$ is the hepatic artery.