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
Plaster mix: 
Select and explain. 
A. Rapid spatulation results in decreased setting time, B. 2% potassium sulphate is accelerator, C. Citrates are retarders, D. All of the above
D: All of the above
Answer: D: All of the above 
Explanation: None