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 Input:
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 Output:
G


Ex Input:
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

Ex Output:
E


Ex Input:
Fact1: Mutations are essential for evolution to occur., Fact2: Genomic evolution drives the evolution of the translational system., Question: What drives the genomic changing of the translational system? (A) environment (B) A computer (C) chromosome abnormalities (D) extincion (E) migration (F) mutations (G) acetic acid (H) competition

Ex Output:

F