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': 'Change in length of upper anterior teeth in complete denture teeth setting, which sounds are affected: \nSelect and explain. \nA. f, v, B. d, t, C. Dentoalveolar sounds, D. b, p, m', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]