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").
Q: Fact1: cutting down trees has a negative impact on an ecosystem, Fact2: Trees are cut down in the forest and are then sent to a paper mill., Question: a what can have a negative impact on ecosystem (A) paper mill (B) A virus (C) deforestation (D) storm (E) disease (F) rainfall (G) tree (H) Pollution
A:
A