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
True about area specific Curette is 
Select and explain. 
A. Used in specific areas, B. Curved in two planes, C. One cutting edge is used, D. All of the above
D: All of the above
Answer: D: All of the above 
Explanation: None