Which stretch reflex processing route is true?
A.
Sensory fiber→Sensory neuron→Spinal cord(gray matter)→Brain→Spinal cord(gray matter)→Motor neuron→Muscles
B.
Sensory fiber→Sensory neuron→Spinal cord(gray matter)→Motor neuron→Muscles
C.
Sensory fiber→Sensory neuron→Spinal cord(white matter)→Brain→Spinal cord(white matter)→Motor neuron→Muscles
D.
Sensory fiber→Sensory neuron→Spinal cord(white matter)→Motor neuron→Muscles