A portal triad in the liver consists of which three basic structures:

A) a common bile duct, and branches of the right and left hepatic ducts.
B) a branch of the hepatic portal vein, a branch of the hepatic artery, and a bile duct.
C) branches of the hepatic portal vein, hepatic vein, and hepatic artery.
D) branches of the hepatic artery, central vein, and hepatic vein.