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").

Input: Consider Input: Fact1: All life relies on a relatively narrow range of pH, or acidity., Fact2: All organisms have life cycles., Question: what relies on a relatively narrow range of acidity? (A) organisms (B) carbon (C) animals (D) hydrogen (E) density (F) trees (G) Most plants (H) barnacles

Output: A

Input: Consider Input: Fact1: Viruses cause many human diseases., Fact2: Some smallpox viruses are maintained in laboratories., Question: What can smallpox cause? (A) contamination (B) harmful substances (C) vaccines (D) photosynthesis (E) extinction (F) cellular respiration (G) Destroy crops (H) human disease

Output: H

Input: Consider Input: Fact1: a circle graph can be used to display percents, Fact2: Percents are decimal fractions., Question: What does a circle graph display? (A) backbones (B) 295 degrees Kelvin (C) occurs over a wide range (D) a surface not sterilized (E) Decimal fractions (F) 70-75 degrees Fahrenheit (G) Irrational numbers (H) Unmeasurable units
Output: E