What is the most accurate representation of the relationship between the brain and spinal cord

A)  The spinal cord communicates with the brain but is separated by the meninges. 
B)  The spinal cord receives commands from the brain through nerves and cerebrospinal fluid. 
C)  The spinal cord and brain contribute independently to the central nervous system. 
D)  The spinal cord is an extension of the brain.

Spinal Cord

A long, thin, tubular structure made up of nervous tissue that extends from the medulla oblongata in the brain down to the lower back, acting as a major part of the central nervous system.

Brain

The organ located in the head of humans and other vertebrates that is the central hub for nervous system activity.

Meninges

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