This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Health education & planning, Subject name: Social & Preventive Medicine
[{'content': 'Critical path is showm by \nSelect and explain. \nA. Money, B. Man power, C. Time, D. Proper sequence', 'role': 'user'}, {'content': "Answer: C \nExplanation: Ref:Park's Textbook of Preventive and Social Medicine 25th Ed", 'role': 'assistant'}]