Cameron Touches a Hot Iron and Immediately Pulls His Hand

Multiple Choice

Cameron touches a hot iron and immediately pulls his hand away. His quick response occurs because:

A) his glands have secreted chemical messengers called hormones.
B) the brain has registered that pain is occurring and responds quickly.
C) neurons in the spinal cord touch end to end to increase response speed.
D) spinal reflexes are automatic, requiring no conscious effort.