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: a delta is formed by deposition of sediment at the mouth of a river by water fanning out, Fact2: Rivers provide a water supply., Question: What is formed by deposition of sediment at the mouth of a water supply fanning out? (A) a hurricane (B) soils (C) a delta (D) an ocean (E) soft soil (F) an island (G) detritus (H) spring

A: C
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Q: Fact1: extreme heat and pressure change rock into metamorphic rock, Fact2: Slate is a metamorphic rock., Question: What rock is formed by extreme heat and pressure (A) erosion (B) crust (C) calcite (D) Slate (E) dead (F) forces (G) fibrous (H) complex

A: D
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Q: Fact1: Chemical bonds form when substances react with one another., Fact2: Chemical bonds vibrate., Question: what does substances reacting with one another cause? (A) density (B) forces (C) vibration (D) death (E) illness (F) earthquakes (G) Leptospirosis (H) volume

A:
C
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