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': 'Increased spatulation is case of dental stone results in \nSelect and explain. \nA. Increased working time, B. Increased setting time, C. Decreased setting time, D. None of the above', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]