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': 'Monetary terms involve \nSelect and explain. \nA. Cost benefit analysis, B. Network analysis, C. Slow pathway, D. All', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ref: 25th Ed K.Park's Textbook Of Preventive and Social Medicine", 'role': 'assistant'}]