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': 'A 10-year-old child reports with Loss of primary lower 2nd molar. His occlusion is normal. The clinician should: \nSelect and explain. \nA. Construct suitable RPD, B. Place a functional space maintainer, C. Make a distal-shoe space maintainer, D. Base his choice of treatment upon X-ray findings', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]