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: Medicine
[{'content': 'An association of which of the following bacteria has been suggested with atherosclerosis: \nSelect and explain. \nA. Staphylococcus Aureus, B. Streptococcus Pneumoniae, C. Chlamydia Pneumoniae, D. Aspergillus Fumigatus', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Evidence for Chlamydia Pneumoniae thus far presents the strongest association with human atherosclerosis.', 'role': 'assistant'}]