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': 'Inadequate pressure application during flasking: \nSelect and explain. \nA. Increases vertical dimension, B. Causes teeth to be shrunken in investment, C. Causes poor quality of colour, D. Causes fracture of denture', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]