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").

Example Input: Fact1: Mutations are essential for evolution to occur., Fact2: Mutations are changes in the DNA sequence., Question: What is essential for evolution to occur? (A) Changes in DNA sequences (B) Plant reproduction (C) Natural disasters (D) Gamma radiation (E) biological diversity (F) DNA sequences staying the same (G) the environment (H) that material's properties
Example Output: A

Example Input: Fact1: Chromosomes are coiled structures made of DNA and proteins., Fact2: DNA is deoxyribonucleic acid., Question: chromosomes are coiled structures made of proteins and what? (A) solid, liquid, gas (B) density (C) Something that causes allergies (D) deoxyribonucleic acid (E) It helps them survive (F) inheritance (G) blood cells (H) allow growth
Example Output: D

Example Input: Fact1: evaporation can be used for separating a solute from a solvent in a solution, Fact2: Heating liquids is also made easier by allowing saturated gas to reduce evaporation., Question: What can be used to separate a solute from a solvent in a solution? (A) flow of electrons (B) Dehydration (C) heat energy (D) heating liquids (E) a hydraulic system (F) water vapor (G) kinetic energy (H) Time and energy
Example Output:
D