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: Dental
[{'content': 'A most insanitary method that creates public health hazards, nuisance and severe pollution of environment is \nSelect and explain. \nA. Incineration, B. Controlled tipping, C. Dumping, D. Composting', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]