Which Statement Regarding Placental Circulation Is True

Which statement regarding placental circulation is true?

A) Oxygenated maternal blood re-enters the mother's venous system through chorionic villi.
B) Maternal and fetal blood mix near the placenta.
C) Deoxygenated maternal blood re-enters the mother's venous system through small uterine veins.
D) Deoxygenated blood leaves the chorionic villi through umbilical arteries.
E) Oxygenated fetal blood enters the chorionic villi through umbilical arteries.