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': 'Major connectors of a maxillary RPD may be beaded to: \nSelect and explain. \nA. Produce a stronger frame work, B. Aid in retention of removable partial denture, C. Hold acrylic resin to the metal, D. Produce positive contact with the tissue', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]