What Is the Main Reason Why Relatively Greater Amounts of Biofilm

What is the main reason why relatively greater amounts of biofilm form in dental unit waterlines than in other types of waterlines?

A) Because there are no microbes in any other type of waterlines
B) Because water in dental units never contains any chlorine normally added at the water treatment plant
C) Because the small diameter of these lines causes a high ratio of waterline surface to water volume
D) Because the microbes in water are capable of attaching only to the material used to make dental unit waterlines