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: a fire requires oxygen to burn, Fact2: In the vacuum of space, there's no oxygen to burn., Question: Where is fire impossible? (A) evaporation (B) In space (C) A computer (D) uncontrolled (E) Inside a car (F) On television (G) summer end (H) On a mountain
Example Output: B

Example Input: Fact1: information in an organism 's chromosomes cause genetic traits to be passed down to that organism 's offspring, Fact2: DNA, which contains our genetic code, is the basic building block of chromosomes., Question: DNA causes what to inherit genetic traits? (A) offspring (B) some mammals (C) ancestors (D) Nematoda (E) heterotrophs (F) animals (G) minerals (H) grandparents
Example Output: A

Example Input: Fact1: a airplane is used for moving people across bodies of water, Fact2: Airplanes Air travel is the quickest way to travel and is probably best for long distances., Question: What is used for moving people across bodies of water? (A) Air travel (B) Waves (C) Cars (D) heat energy (E) electricity (F) engines (G) Trains (H) energy
Example Output:
A