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: Biodiversity increases the productivity and stability of ecosystems., Fact2: Ecotourism, on the other hand, can help to conserve biodiversity., Question: What increases the stability of ecosystems? (A) overpopulation (B) water consumption (C) loose soil (D) Quality of life (E) agriculture (F) deforestation (G) ecotourism (H) trees
Example Output: G

Example Input: Fact1: Viruses contain DNA but not much else., Fact2: All viruses consist of RNA or DNA and a protein coat., Question: what do viruses contain? (A) Mass (B) DNA (C) SNPs (D) RNA (E) acid (F) gene (G) ovum (H) host
Example Output: D

Example Input: Fact1: Macroevolution occurs over geologic time above the level of the species., Fact2: Few families rival Piperaceae for difficulties at the species level., Question: Macroevolution can occur in the taxonomical level called: (A) ferns (B) alpacas (C) complex (D) three (E) cracking (F) family (G) PDAs (H) ligt
Example Output:
F