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: when a metal rusts , that metal becomes orange on the surface, Fact2: Cast-iron and steel surfaces are susceptible to corrosion in the form of rust., Question: Cast-iron and steel surfaces are susceptible to becoming what on the surface? (A) hardness (B) solid (C) irritants (D) acids (E) orange (F) heat (G) Unsafe (H) damaging

A: E
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Q: Fact1: Some parasites live on the surface of their host., Fact2: Leeches are external parasites., Question: What unwanted creature would be found on the surface of a human body using it as a host?  (A) Tapeworm. (B) Leeches. (C) Pesticides (D) animals (E) insects (F) Hookworm (G) bacteria (H) Bracelet.

A: B
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Q: Fact1: Feathers help birds fly and provide insulation., Fact2: To survive the chill, warm-blooded penguins rely on feathers and fat for insulation., Question: Birds do what using the feathers that help them to fly? (A) to move people (B) running and lifting (C) survive the chill (D) during the day (E) Move to another area (F) Earth orbiting the Sun (G) to stay warm (H) supersonic

A:
C
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