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").

[EX Q]: Fact1: Feathers help birds fly and provide insulation., Fact2: Some birds are flightless birds., Question: Why do the flightless have feathers? (A) layers of fat (B) Sublimation (C) it needs them (D) warm-blooded (E) Air conditioning (F) Radiation (G) Insulation (H) protect them
[EX A]: G

[EX Q]: Fact1: vein deposits of gold and silver are formed by igneous intrusion, Fact2: Intrusive igneous rocks account for sections of higher elevation., Question: vein deposits of gold and silver are formed where? (A) loose soil (B) aqueous solution (C) graptolites (D) tectonic plates coliding (E) higher elevations (F) mountain sources (G) flow of electrons (H) In sediment
[EX A]: E

[EX Q]: Fact1: a plant requires sunlight to grow, Fact2: Still it takes about eight minutes for sunlight to travel from the sun to the earth., Question: A plant requires what to grow? (A) Something that is created on Mars (B) Something made primarily of oxygen and nitrogen (C) Something that is found on Jupiter (D) Something that take eight minutes to travel to the Earth (E) Basic units of the plant body. (F) keeping food fresh for long periods of time (G) Something that comes from the Moon (H) Something whose growth is discouraged by heavy wet soils
[EX A]:
D