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: harming an animal species causes that animal 's population to decrease, Fact2: Killing snakes is more than unnecessary and harmful to the ecosystem., Question: What can killing snakes cause? (A) Snake population decrease. (B) DNA damage and mutations (C) Snake population variation. (D) death and devastation (E) dead organisms (F) Snake population increase. (G) Destroy crops (H) Snake population stabilization
Output:
A