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
Magnetostrictive handpiece 
Select and explain. 
A. Is Ultrasonic instrument, B. Has elliptical motion, C. Heats up more, requires coolant, D. All of the above
D: All of the above
Answer: D: All of the above 
Explanation: None