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
Coefficient of thermal expansion of the wax is: 
Select and explain. 
A. 30×10-6/°C, B. 50×10-6/°C, C. 350×10-6/°C, D. 35×10-6/°C
C: 350×10-6/°C
Answer: C: 350×10-6/°C 
Explanation: Waxes have low thermal conductivity and a high coefficient of thermal expansion.