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': 'Alveolar process helps in providing \nSelect and explain. \nA. Support and retention to the complete denture, B. Boundaries for the tongue during speech, C. Attachment to muscles of facial expression, D. Support the natural teeth', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]