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
[{'content': 'In the lactobacillus count test, which reading will be inferred as "Marked degree of caries activity"? \nSelect and explain. \nA. >100/mL, B. >1000/mL, C. >10,000/mL, D. None of the above', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]