instruction:
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").
question:
Fact1: most canyons are formed by flowing rivers through erosion over long periods of time, Fact2: Canyon formed as a consequence of river erosion., Question: what does erosion form? (A) valleys (B) Sediment (C) mountains (D) canyons (E) soils (F) hills (G) soft soil (H) loose soil
answer:
D

question:
Fact1: measuring the hardness of minerals requires scratching those materials, Fact2: To figure out the hardness of a mineral, the Moh's scale of hardness is used., Question: the Moh's scale of hardness is used by doing what to the materials (A) heating (B) tool extensions (C) protection (D) classified (E) scratching (F) as a base (G) how they move (H) Cladistics
answer:
E

question:
Fact1: contact between rocks over long periods of time causes rocks to smooth, Fact2: Granite is rock formed by fire., Question: Contact between what over long periods of time causes them to smooth? (A) graptolites (B) Smooth music. (C) Contact lenses. (D) calcite (E) Granite. (F) loose soil (G) rivers (H) Time periods.
answer:
E