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: Molecules of DNA are encoded with instructions that tell cells what to do., Fact2: Genes, made of DNA, carry the instructions for building proteins., Question: what do genes carry? (A) pollen (B) Energy (C) calories (D) instructions (E) Chemical energy (F) fat (G) acid (H) colors
Example Output: D

Example Input: Fact1: a light bulb converts electrical energy into light energy when it is turned on, Fact2: Fluorescent light bulbs use half the electricity of standard bulbs., Question: What do flourescent bulbs do? (A) Change colors (B) reproduce (C) staying warm (D) dormant state (E) direct energy (F) spread flower seeds (G) use less energy (H) duplicate itself
Example Output: G

Example Input: Fact1: Fish have a circulatory system with a two-chambered heart., Fact2: Birds also have four-chambered hearts., Question: What aspect is different for Bird and fish hearts (A) circulatory systems (B) matter vibrating (C) tissue (D) it keeps an organism warm (E) members of their own species (F) heat produced (G) blood (H) type of organs
Example Output:
A