Answer the following question given this paragraph: 

The blue lines in this drawing represent nerves of the peripheral nervous system. Every peripheral nerve is connected directly or indirectly to the spinal cord. Notice the thick sciatic nerve. It is the longest (and thickest) nerve in the body, running from the lower region of the spinal cord to just above the knee.


Q: Every peripheral nerve is connected directly or indirectly to what?

 Choices:

- the functional cord

- the umbilical chord

- the optimal cord

- the spinal cord

A:
the spinal cord
