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
Minor modifications done in the existing tooth contours to improve a smile is termed - 
Select and explain. 
A. Cosmetic contouring, B. Smile contouring, C. Micro dentistry, D. Enamel reshaping
A: Cosmetic contouring
Answer: A: Cosmetic contouring 
Explanation: None