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: some animals' fur grows thicker for staying warm in the winter, Fact2: During winter, their hollow fur absorbs much heat as they sun themselves., Question: hollow fur keeps animals what (A) fats (B) camouflaged (C) safe (D) warm (E) cooled (F) liquid (G) live (H) from drowning
[A]: D

[Q]: Fact1: Migrants typically travel long distances., Fact2: Migrant birds arrive., Question: What travels long distances? (A) humans (B) jets (C) rocks (D) birds (E) camels (F) cocoons (G) Light (H) eggs
[A]: D

[Q]: Fact1: Skin color is a polygenic trait., Fact2: Polygenic inheritance Polygenic traits are controlled by an unknown number of genes., Question: Where does skin color come from? (A) tissue made of chondrocytes (B) Nobody knows (C) rapid changes occur (D) It's a choice (E) Exposure to oxygen and water (F) It's randomized (G) It's inherited from genes (H) last stage before adulthood
[A]:
G