Answer the following question given this paragraph: 

The central nervous includes the brain and spinal cord. The brain is the control center of the nervous system. It controls virtually all mental and physical processes. The spinal cord is a long, thin bundle of nervous tissue that passes messages from the body to the brain and from the brain to the body.


Q: The brain and spinal cord are part of what system, which serves as a control center?

 Choices:

- primary nervous system

- active nervous system

- large nervous system

- central nervous system

A:
central nervous system
