The Reticular Activating System in the Brainstem Can Promote Wakefulness

The reticular activating system in the brainstem can promote wakefulness

A) when sensory information from the spinal cord passes through and activates nuclei in the brainstem.
B) when descending information from the thalamus indicates the wake/sleep cycle.
C) if the cranial nerves transmit information about increased energy needs.
D) when stimulated by the vagus nerve.
E) when input from the cerebrum activates cerebellar nuclei.