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: Surgery
The elevator can be used to advantage when: 
Select and explain. 
A. The tooth to be extracted is isolated, B. The interdental bone is used as a fulcrum, C. The adjacent tooth is not to be extracted, D. Multiple adjacent teeth are to be extracted
D: Multiple adjacent teeth are to be extracted
Answer: D: Multiple adjacent teeth are to be extracted 
Explanation: None