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: Pharmacology
[{'content': 'A distinct advantage that tetracyclines have over penicillins is that tetracyclines: \nSelect and explain. \nA. Have no side effects, B. Do not cause superinfections, C. Are safer to use during pregnancy, D. Have a wider range of antibacterial activity', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]