Fred is studying his notes from anatomy class. One list in his notes describes features of a CNS structure. anterior horns and posterior horns gray matter inside, white matter outside hippocampus central canal Fred thinks this list contains an error. Which best describes the error? Most items are features in the brain, but the gray and white matter locations correspond to the spinal cord. Most items are features in the brain, but the horns are in the spinal cord. Most items are features in the spinal cord, but the central canal is in the brain. Most items are features in the spinal cord, but the hippocampus is in the brain.