The human nervous system is broken up into central and peripheral parts. the central system can is made up of

You're on the right track. The central nervous system is made up of the brain and spinal cord. 

The peripheral is made up of nerve fibers that goes off from the spinal cored, and extends to all parts of the body.

For example: The neck, torso, arms and legs, skeletal muscles and the internal organs.

The answer would be d. most contraceptives are effective when used properly