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 Q]: Fact1: the emission of sulfur dioxide causes acid rain, Fact2: The sulfur dioxide is converted into sulfuric acid., Question: what causes acid rain? (A) gases (B) rainfall (C) Pollution (D) fossil fuels (E) emissions (F) vehicles (G) burning (H) wind
[EX A]: E

[EX Q]: Fact1: irradiating food can be used to kill existing microorganisms in the food, Fact2: Food-Borne Illnesses are the sickness that results from eating foods that are contaminated with harmful bacteria and other microorganisms., Question: Which food is most unlikely to cause an illness if eaten? (A) Deoxyribonucleicacid (B) single-celled organisms (C) animals with backbones (D) Roundworms (E) deoxyribonucleic acid (F) one celled organisms (G) irradiated fruit (H) Jellyfish
[EX A]: G

[EX Q]: Fact1: breathing is when a gill converts from oxygen in water into oxygen in blood, Fact2: Gill slits form gills in fish., Question: What converts oxygen in water into oxygen in blood? (A) sharks (B) germs (C) Enzymes (D) starfish (E) rivers (F) Jellyfish (G) streams (H) a fish
[EX A]:
H