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: crossing two living things with recessive traits causes their offspring to have that recessive trait, Fact2: Freckles are an autosomal recessive trait., Question: Crossing two living things with freckles causes who to have freckles? (A) pebbles (B) sea urchins (C) humans (D) some mammals (E) makeup (F) clothing (G) monotremes (H) offspring
[A]: H

[Q]: Fact1: Ethologists usually study how animals behave in their natural environment., Fact2: Ethologists study animal behavior., Question: what study animals in their natural environment? (A) animal behaviorists (B) it keeps an organism warm (C) animal owners (D) biological diversity (E) animal hunters (F) retaining heat (G) by indirect light (H) animal eaters
[A]:
A