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': 'Objectives of surveying master cast is \nSelect and explain. \nA. Selection of most suitable path of insertion, B. Measurement of retentive areas, C. Blocking out, D. All of the above', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Because surveying the master cast follows mouth preparation, the path of placement, the location of retentive areas, and the location of remaining interference must be known before proceeding with the final design of the denture framework.', 'role': 'assistant'}]