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': 'Within practical limits, using less water in mixing plaster will result in a set product that \nSelect and explain. \nA. Contracts, B. Is stronger, C. Is more porous, D. Is less brittle', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]