You will be given a definition of a task first, then some input of the task.
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").

Fact1: lightning can cause a forest fire, Fact2: Lightning is very common during storms., Question: Which weather event can cause forest fires? (A) thunder storms (B) mud slides (C) Warmer temperatures (D) snow, ice, and rock (E) thermal expansion (F) very complex (G) humidity (H) snow storms
Output:
A