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
Which of the following is/are used as die material: 
Select and explain. 
A. Gypsum, B. Epoxy resin, C. Electroplated silver, D. All of the above.
D: All of the above.
Answer: D: All of the above. 
Explanation: None