What protects the brain as a whole by providing an internal cushion

A)  meninges 
B)  ventricles filled with CSF 
C)  myelin sheaths 
D)  synaptic vesicles

Ventricles

Cavities within the brain that produce and contain cerebrospinal fluid, important for protecting and nourishing the brain.

Meninges

The three layers of protective tissue called the dura mater, arachnoid mater, and pia mater that encase the brain and spinal cord.

Myelin Sheaths

Protective coverings around nerve fibers that facilitate the rapid transmission of neural signals.