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 wetting of an adherent surface by an adhesive is related to: 
Select and explain. 
A. Surface energy of the adherent, B. Surface texture of the adherent, C. Surface tension of the adherent, D. Nature of the adherent that is crystalline or amorphous
A: Surface energy of the adherent
Answer: A: Surface energy of the adherent 
Explanation: None