For a Person to Make a Fist, Which One of the Following

For a person to make a fist, which one of the following must occur?

A) The central nervous system must send a message through the spinal cord and then to the peripheral nerves.
B) The central nervous system must send a message through the spinal cord and then to the autonomic nervous system.
C) The peripheral nervous system must send a message to the brain and then back through the peripheral nervous system.
D) The muscles must signal the brain to send a message through the autonomic nervous system.