Which of the following is true about gray and white matter in the spinal cord and brain?
A. White matter in the spinal cord and brain are found on the outer parts or cortex.
B. Gray matter in the spinal cord and brain are found on the outer parts or cortex.
C. Gray matter is found in the core of the spinal cord and in the cortex of the brain.
D. White matter is found in the core of the spinal cord and in the cortex of the brain.