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': 'Acrylic (cold cure) \nSelect and explain. \nA. Melts at 100°C, B. Softens at 100°C, C. Still requires heat for polymerization, D. Produces heat during polymerization', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]