Which of the following is TRUE about simple reflexes?

Simple reflexes, known also as spinal reflexes, travel through the spinal cord only, and do not reach the brain.
Spinal reflexes are involuntary and automatic responses to stimuli that occur in the body. They are mediated by the spinal cord, which is a long bundle of nerves that runs down the back.
When a stimulus is detected by a sensory nerve, the nerve sends a signal to the spinal cord. The spinal cord then sends a signal to a motor nerve, which causes the muscle to contract. This entire process happens very quickly, without the need for the brain to be involved.