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': 'Function of carnauba wax: \nSelect and explain. \nA. To provide a smooth and glossy surface, B. Increase toughness, C. Decrease toughness, D. Decrease flow at room temperature', 'role': 'user'}, {'content': 'Answer: D \nExplanation: 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.', 'role': 'assistant'}]