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" in network analysis is \nSelect and explain. \nA. Most expensive path in a network, B. Congested path in a network, C. Shoest path in a network, D. Longest path in a network', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Critical path method: the longest path of the network is called critical path. If any activity along the path is delayed, the entire project will be delayed.Park 23e pg: 872', 'role': 'assistant'}]