Question

What is the primary cause of dental disease?

Answer 1

 the primary cause of dental disease is plaque , C

Answer 2

Hey,

It would be Plaque because plaque is a sticky deposit on teeth in which bacteria proliferate. 

which we know bacteria is Bacteria constitute a large domain of prokaryotic microorganisms. Typically a few micrometres in length, bacteria have a number of shapes, ranging from spheres to rods and spirals!