Refer to the Figure

Refer to the figure.
Which statement best describes the process illustrated in the figure?

A) When weight stretches a muscle, excited afferents directly excite the motor neuron of the muscle, and the muscle contracts.
B) Information terminating on the spinal interneuron in a stretch reflex facilitates contraction of antagonistic muscles to protect them from injury.
C) Interneurons in the stretch reflex inhibit over-contraction of the stretched muscle.
D) Spinal reflexes are not modulated by the brain.