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
Function of carnauba wax: 
Select and explain. 
A. To provide a smooth and glossy surface, B. Increase toughness, C. Decrease toughness, D. Decrease flow at room temperature
D: Decrease flow at room temperature
Answer: D: Decrease flow at room temperature 
Explanation: This wax is very hard, and it has a relatively high melting point and it has an agreeable odor. It is combined with the paraffin to decrease flow at mouth temperature.