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").
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Question: Fact1: Organs of excretion make up the excretory system., Fact2: Digestive system Excretory system removes waste and toxic substances from blood., Question: What removes waste and toxic substances from the blood? (A) Special disposal (B) Something coming from a gland (C) aqueous solution (D) Veins and arteries. (E) digestive system organs (F) that material's properties (G) Something that causes allergies (H) microorganisms

Answer: E

Question: Fact1: Mating is generally preceded by courtship., Fact2: For example, a black rooster and a white hen mate, and the resulting offspring are gray., Question: What can result in offspring? (A) seeds (B) competition (C) courtship (D) travel (E) resistance (F) solitude (G) litter (H) reading

Answer: C

Question: Fact1: the emission of sulfur dioxide causes acid rain, Fact2: Polluted rain is called acid rain ., Question: What causes pollution in rain? (A) sulfur dioxide (B) carbon dioxide (C) nitrogen (D) contamination (E) smog (F) hydrogen (G) fossil fuels (H) flooding

Answer:
A