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: Microbiology
[{'content': 'Colorado Tic fever is caused by: \nSelect and explain. \nA. Filoviridae, B. Reoviridae, C. Coronaviridae, D. Calciviridae', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. b. Reoviridae', 'role': 'assistant'}]