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: Some viruses can cause cancer., Fact2: Cancer is an example of a mutation in cells., Question: What can mutate cells? (A) Allergies (B) water (C) fruits (D) flow of electrons (E) vegetables (F) harmful substances (G) rays or beams (H) some viruses
Example Output: H

Example Input: Fact1: predicting weather requires studying weater, Fact2: Meteorologists try to predict the weather., Question: What do meteorologists study? (A) Meatballs (B) amount of heat (C) Meteors (D) The weather. (E) related organisms (F) Music (G) air masses (H) Seisometers
Example Output: D

Example Input: Fact1: Streams may start with runoff or water seeping out of a spring., Fact2: Rain is assumed to occur as direct runoff., Question: What may streams start as? (A) rivers (B) dirt (C) liquid (D) light (E) rainy (F) sun (G) rain (H) floods
Example Output:
G