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
Chief advantage of sanitary pontic is 
Select and explain. 
A. Economical, B. Easy to fabricate, C. Easy to keep oral hygiene, D. All of the above
C: Easy to keep oral hygiene
Answer: C: Easy to keep oral hygiene 
Explanation: None