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': 'Sprue former should be attached to the bulkiest portion of wax because: \nSelect and explain. \nA. Minimizes the effect of released residual stresses, B. To ensure that thinner cross section of the mold will be filled, C. Melt will be fluid enough for all lesser dimension sectors to be adequately filled, D. All of the above', 'role': 'user'}, {'content': 'Answer: D \nExplanation: The sprue former should be attached to the bulkiest part of the wax pattern because of the following reasons:\n\nThis will minimize the effect of released residual stresses by the heat of attaching the sprue.\nIt will ensure that the thinner cross-section of the mold will be filled completely.\nThe melt will always be fluid enough and available until all lesser dimension sections are adequately filled.', 'role': 'assistant'}]