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: Air pollution harms the respiratory and circulatory systems., Fact2: Cars are a significant source of air pollution., Question: What harms the respiratory and circulatory systems? (A) oil (B) rain (C) sulfur (D) cars (E) tires (F) coal (G) tar (H) bicycles
Example Output: D

Example Input: Fact1: an electric stove transforms electrical energy to heat energy, Fact2: Kinetic energy is energy of movement and also includes heat energy and light energy., Question: What transforms electrical energy to kinetic energy? (A) an engine (B) mechanical waves (C) transportation technology (D) Riding a bike (E) Males and females (F) an electric stove (G) a hydraulic system (H) Firecrackers
Example Output: F

Example Input: Fact1: Chromosomes are coiled structures made of DNA and proteins., Fact2: Genes are part of the chromosomes and coded for on the DNA strands., Question: What are a part of coiled structures made of DNA and proteins? (A) seeds (B) alleles (C) genes (D) skin (E) PDAs (F) coils (G) ovaries (H) complex
Example Output:
C