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': 'Loss of capsule in bacteria is generally associated with \nSelect and explain. \nA. Decrease in virulence, B. Loss of infectivity, C. Inability to spread through tissue, D. Increase in invasiveness', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]