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: cold fronts cause thunderstorms as they pass by, Fact2: Thunderstorms create havoc., Question: What do cold fronts cause? (A) death (B) complex (C) wind (D) streams (E) deadly (F) disease (G) havoc (H) mildew
Example Output: G

Example Input: Fact1: Most plants continue to grow throughout their lives., Fact2: Plants require nutrients for growth., Question: What is required for growth through life? (A) Energy (B) Energy. (C) sunlight (D) heat energy (E) nutrients (F) oxygen (G) incubation (H) soil
Example Output:
E