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': "Strength of gypsum can be measured with: \nSelect and explain. \nA. Vicat needle, B. Gillmore needle, C. Kreb's penetrometer, D. Universal testing machine", 'role': 'user'}, {'content': 'Answer: D \nExplanation: A typical universal testing machine can\xa0analyze\xa0materials\xa0in\xa0tension,\xa0compression,\xa0or shear.', 'role': 'assistant'}]