Detailed Instructions: In this task, you are given two facts, and a multiple-choice question. Based on the given facts, answer the question with index of the correct option (e.g, "A").
Q: Fact1: measuring the hardness of minerals requires scratching those materials, Fact2: Calcite is a very common mineral., Question: Measuring the hardness of calcite requires what? (A) melting those materials (B) hardened backbone (C) amount of heat (D) 70-75 degrees Fahrenheit (E) cutting those materials (F) scratching yourself (G) thermal expansion (H) scratching those materials
A:
H