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': 'Which of the following is true about Enteropathogenic E coli - \nSelect and explain. \nA. Causes diarrhea in infants, B. Acts by invasion of Intestinal epithelial cells, C. Adults are mostly affected, D. Affects immunocompromised host', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]