Q: 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: cutting down trees has a negative impact on an ecosystem, Fact2: Black spruce is the dominant tree species., Question: what has a negative impact on the ecosystem when cut down? (A) humans disturb it (B) scarce resources (C) Smoking (D) disease (E) black spruce (F) swamp vegetation (G) deforestation (H) Pesticides
A:
E