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': 'Compressive stress is computed by dividing the\nexternal force by the: \nSelect and explain. \nA. Area of the test specimen upon which the weight rests, B. Elasticity of the test specimen in strain, C. Length of the test specimen beneath the force, D. Strain of the test specimen per unit Length', 'role': 'user'}, {'content': 'Answer: A \nExplanation: COMPRESSIVE STRESS\nWhen a body is placed under a load that tends to compress or shorten it, the internal resistance to such a load is called a\xa0compressive stress. A compressive stress is associated with a compressive\xa0 strain.\xa0To\xa0calculate\xa0compressive\xa0stress,\xa0the\xa0applied force is divided by the cross-sectional area perpendicular to the axis of the applied force.\nKey Concept: To\xa0calculate\xa0compressive\xa0stress,\xa0the applied force is divided by the cross-sectional area perpendicular to the axis of the applied force.\nPhillips dental materials 12th edition page no 51', 'role': 'assistant'}]