Thomas Was Distracted as He Was Cooking, and He Inadvertently

Multiple Choice

Thomas was distracted as he was cooking, and he inadvertently touched a very hot dish. Instantaneously, he jerked his hand back, a reflexive action that was processed:

A) in his spinal cord.
B) simultaneously in his spinal cord and brain.
C) first in his brain, then a moment later in his spinal cord.
D) with no involvement of the central nervous system.