Blood Supplies Oxygen and Nutrients to the CNS

Blood supplies oxygen and nutrients to the CNS. It flows to the brain mainly via the

A) external carotid arteries and the external jugular veins.
B) internal carotid arteries and the internal jugular veins.
C) internal carotid arteries and the vertebral arteries.
D) external carotid arteries and the dural sinuses.
E) external carotid arteries and the internal carotid arteries.