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").
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Question: Fact1: erosion causes a river to become deeper and wider, Fact2: Weathering and erosion continue to shape it today., Question: Weathering causes what to become deeper and wider? (A) a landslide (B) Sediment (C) a mountain (D) a volcano (E) soils (F) rock (G) flooding (H) a river

Answer: H


Question: Fact1: keeping food cold is used for keeping food fresh, Fact2: A refrigerator that keeps food cold., Question: What is a refrigerator used for? (A) Electrical energy (B) A place to hang magnets (C) Cooling your home (D) staying warm (E) A doorstop (F) electricity (G) energy usage (H) Keeping food fresh

Answer: H


Question: Fact1: chemical weathering causes iron in rock to oxidize, Fact2: When iron oxidizes, it rusts., Question: What causes iron to rust? (A) Chemical energy (B) High pressure (C) harmful substances (D) Greenhouse gasses (E) permineralization (F) Chemical weathering (G) Cold temperatures (H) Direct heat

Answer:
F