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").

Ex Input:
Fact1: Viruses cause many human diseases., Fact2: Examples include influenza, rabies, HIV, and Herpes viruses., Question: What causes human disease? (A) HPV (B) UV (C) minerals (D) Tamiflu (E) mold (F) HIV (G) human growth (H) CFCs

Ex Output:
F


Ex Input:
Fact1: darkness has a negative impact on photosynthesis, Fact2: Light is necessary for photosynthesis, a process that produces oxygen., Question: Darkness has a negative impact on which process of a plant? (A) slow and inefficient (B) chemical changes (C) circulatory systems (D) most organisms (E) fossil fuels (F) Abnormal cell growth (G) deoxyribonucleic acid (H) Oxygen production

Ex Output:
H


Ex Input:
Fact1: if a tree falls then sunlight becomes available to the surrounding plants, Fact2: More trees are cut for firewood and for homes., Question: using firewood for homes allows what to become available to the surrounding plants (A) reproduce (B) Light (C) nutrients (D) energy (E) Energy. (F) sunlight (G) growth (H) heat

Ex Output:

F