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: Social & Preventive Medicine
[{'content': 'High environmental temperature, best step for malaria control? \nSelect and explain. \nA. Remove breeding place, B. Full sleeve cloth, C. Indoor insecticide, D. Early treatment', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. is \'a\' i.e., Remove breeding place "The most impoant step in reducing number of mosquitoes is to eliminate their breeding places" Park', 'role': 'assistant'}]