In the Figure Shown Here, the Blood in the Chamber

In the figure shown here, the blood in the chamber indicated by the arrow marked with "X"

A) is a mixture of O₂-poor and O₂-rich blood.
B) is poor in oxygen.
C) is rich in oxygen.
D) will all be pumped to the lungs.
E) will all be pumped to the systemic capillaries of the body.