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
While halo or line around enamel margin in composite
restoration is not due to 
Select and explain. 
A. Low intensity light curing, B. High intensity light curing, C. Inadequate etching and bonding, D. Traumatic contouring
A: Low intensity light curing
Answer: A: Low intensity light curing 
Explanation: None