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
Surveyor is used for 
Select and explain. 
A. Surveying diagnostic cast, B. Contouring wax patterns, C. Measuring undercuts, D. All of the above
D: All of the above
Answer: D: All of the above 
Explanation: The surveyor may be used for surveying the diagnostic cast, recontouring abutment teeth on the diagnostic cast, contouring wax patterns, measuring a speciﬁc depth of undercut, surveying ceramic veneer crowns, placing intracoronal retainers, placing internal rests, machining cast restorations, and  surveying and blocking out the master cast.