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: Dental
[{'content': 'In a demographic cycle, If death rate is declining but there is no increase in birth rate this population is called as \nSelect and explain. \nA. Early expanding, B. Low stationary, C. High stationary, D. Declining', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]