MrsPerry Is Teaching a Class on the Importance of Sleep

Mrs.Perry is teaching a class on the importance of sleep and rest to her first-year nursing students.How would she explain the purpose of the RAS system?

A) The RAS suppresses the brain centres.
B) The RAS controls the body biorhythm.
C) The RAS maintains wakefulness in the cerebral cortex.
D) The RAS sends stimuli from the cerebral cortex to the body.