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: lungs are used for breathing air by land animals, Fact2: Elephants are the largest animals on land., Question: What uses lungs for breathing air? (A) rocks (B) some mammals (C) Frogs (D) monotremes (E) humans (F) bacteria (G) elephants (H) oak trees
[EX A]: G

[EX Q]: Fact1: Evolution occurs in response to a change in the environment., Fact2: Extinction is a natural part or the process of evolution., Question: What happens to an environment to cause extinction?  (A) relocation (B) changes (C) rain (D) exposure (E) forces (F) wind (G) Pollution (H) discovery
[EX A]: B

[EX Q]: Fact1: recycling has a positive impact on the environment, Fact2: Geoscientists are the caretakers of Earth's resources and environment., Question: Recycling has what kind of impact on the earth? (A) bad (B) making (C) mostly (D) life (E) neutral (F) good (G) ligt (H) destructive
[EX A]:
F