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': 'Gypsum bonded investment should not be heated above \nSelect and explain. \nA. 900 degrees centigrade, B. 1000 degrees centigrade, C. 700 degrees centigrade, D. 800 degrees centigrade', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]