Blood Flow in the Right, Middle, and Left Hepatic Veins

Blood flow in the right, middle, and left hepatic veins is characterized by

A) four phases of flow: two away from the heart and two toward the heart.
B) three phases of flow: two toward the heart and a phase of systolic flow reversal.
C) three phases of flow: one toward the heart and then two away from the heart.
D) four phases of flow: two toward the heart followed by two away from the heart.