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
Piezoelectric handpiece 
Select and explain. 
A. Is ultrasonic instrument, B. Linear motion, C. More efficient than magnetostrictive handpiece, D. v All of the above
D: v All of the above
Answer: D: v All of the above 
Explanation: None