certain strains of Streptococcus mutans a have been proved to be the cause of human dental caries by means of control studies b depend for their cariogenicity on the production of insoluble polysaccharides c cause dental caries by the production of lactic and other acids from fermentation of sugar d are a cause of infective endocarditis e Will induce smooth surface caries in quotes
High-Yield Explanation
Strep. mutans may be an important organism but not the only one, but controlled studies in humans cannot conceivably be carried out