When the Dentist Gives You a Shot of Anesthetic Before

When the dentist gives you a shot of anesthetic before drilling into a tooth, she is numbing a nerve in your mouth, which is a:

A) cranial nerve, part of the peripheral nervous system.
B) cranial nerve, part of the central nervous system.
C) spinal nerve, part of the peripheral nervous system.
D) spinal nerve, part of the central nervous system.
E) None of the answer options is correct.