For the reticular activating system (RAS) to work correctly, what three substances are needed?

A) Oxygen to perfuse brain tissue, glucose to nourish brain tissue, and sodium to keep the brain hydrated
B) Oxygen to perfuse brain tissue, insulin to nourish brain tissue, and sodium to keep the brain hydrated
C) Oxygen to perfuse brain tissue, glucose to nourish brain tissue, and water to keep the brain hydrated
D) Oxygen to perfuse brain tissue, insulin to nourish brain tissue, and water to keep the brain hydrated

C