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: Pathology
[{'content': 'S. mutans is involved in dental caries initiation. Other bacteria also involved is: \nSelect and explain. \nA. S. sarcinus, B. S. macae, C. S. sanguis, D. S. salivarius', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]