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
The minimally acceptable restoration for an endodontically treated maxillary first premolar is: 
Select and explain. 
A. An onlay, B. An MOD amalgam, C. A full cast crown, D. An occlusal amalgam
A: An onlay
Answer: A: An onlay 
Explanation: None