Which of the Following Statements Is TRUE

Which of the following statements is TRUE?

A) In the central nervous system Schwann cells serve as guideposts to show axons where to terminate when regeneration occurs.
B) In the peripheral nervous system Schwann cells serve as signposts to guide axons to their appropriate end points.
C) Schwann cells cannot help damaged axons because neither the central nor the peripheral nervous system can regenerate.
D) Schwann cells are present only in the developing organism and thus have nothing to do with regeneration.