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': 'Ergonomics – \nSelect and explain. \nA. Adjusting the Worker to his job, B. Study of human behavior, C. Study of social mobility, D. None', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ergonomics Simply means "fitting the job to the worker".\nThe object of ergonomics is "to achieve the best mutual adjustment of man and his work, for the improvement of human efficiency and well being".', 'role': 'assistant'}]