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': 'Incisal guidance can be made flatter by \nSelect and explain. \nA. Increasing vertical overlap and increasing horizontal overlap, B. Increasing vertical overlap and decreasing horizontal overlap, C. Decreasing vertical overlap and increasing horizontal overlap, D. Decreasing vertical overlap and decreasing horizontal overlap', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]