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
Change in length of upper anterior teeth in complete denture teeth setting, which sounds are affected: 
Select and explain. 
A. f, v, B. d, t, C. Dentoalveolar sounds, D. b, p, m
A: f, v
Answer: A: f, v 
Explanation: None