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
Gypsum bonded investment should not be heated above 
Select and explain. 
A. 900 degrees centigrade, B. 1000 degrees centigrade, C. 700 degrees centigrade, D. 800 degrees centigrade
C: 700 degrees centigrade
Answer: C: 700 degrees centigrade 
Explanation: None