Terry Takes the Body of a Snake- Like Organism and Slices

Terry takes the body of a snake- like organism and slices it open along its dorsal side. If it is a hagfish, what should Terry see?

A) a well- developed series of bony vertebrae surrounding the spinal cord
B) a well- developed series of cartilaginous vertebrae surrounding the spinal cord
C) a notochord, located underneath the spinal cord
D) a tube of cartilage surrounding the notochord) with dorsal projections on both sides of the spinal cord