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 sandwich technique is recommended for: 
Select and explain. 
A. Class II composite restorations, B. Class V composite restoration, C. Class III composite restoration, D. Both 1 and 2
D: Both 1 and 2
Answer: D: Both 1 and 2 
Explanation: This sandwich technique is recommended for Class II and V composite restorations when individual patients are at a moderate to high risk for caries.
Ref: Phillip’s Science of Dental Materials ed 12 pg 327