This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Physiology
[{'content': 'Lowest most level of integration of stretch reflex is at \nSelect and explain. \nA. Cerebral cortex, B. Lower Medulla, C. Spinal cord, D. All of the above', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]