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 light bulb is used for seeing in the dark, Fact2: Conventional light bulbs generate light by heating a filament., Question: What is helpful for seeing in the dark? (A) an electron microscope (B) an electron lens (C) microscope (D) closing the blinds (E) blackouts (F) closing your eyes (G) focusing a lens (H) heating a filament
[A]: H

[Q]: Fact1: rocks interacting with wind over long periods of time causes weathering, Fact2: On Earth, rocks are weathered by wind and water, creating soil and sand., Question: What causes rocks to weather? (A) seasons (B) force (C) erosion (D) storms (E) water (F) heat (G) lightning (H) gas
[A]: E

[Q]: Fact1: an animal usually requires a warm body temperature for survival, Fact2: Warm blooded animals have a constant body temperature., Question: Animals usually require what for survival? (A) organic molecules (B) organic material (C) Fluctuating body temperature. (D) Ears (E) food and shelter (F) Cold blood (G) Organic compounds (H) Constant body temperature.
[A]:
H