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: Skin color is another polygenic trait., Fact2: Most dental variations are polygenic, that is controlled by several genes., Question: Skin color is a trait controlled by what? (A) prokaryotic cells (B) one gene (C) enzymes (D) keratin (E) one's descendants (F) several genes (G) the environment (H) a single gene

Ex Output:
F


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: Sporangia produce spores that develop into tiny, heart-shaped gametophytes., Fact2: Gametophytes have haploid cells., Question: What do sporangia produce (A) survive (B) Sad cells (C) Haploid constructs (D) Plants growth (E) Haploid cells (F) bioaerosols (G) Happy cells (H) Chemical energy

Ex Output:

E