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: 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
[A]: G


[Q]: Fact1: Cells are programmed to divide only a set number of times., Fact2: Cells reproduce asexually, by dividing., Question: Cells are programmed to _  only a set number of times. (A) migrate (B) expand (C) A computer (D) Most plants (E) allow growth (F) reproduce (G) contract (H) constrict
[A]: F


[Q]: Fact1: cutting down trees has a negative impact on an ecosystem, Fact2: Trees are cut down in the forest and are then sent to a paper mill., Question: a what can have a negative impact on ecosystem (A) paper mill (B) A virus (C) deforestation (D) storm (E) disease (F) rainfall (G) tree (H) Pollution
[A]:
A