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: harming an animal species has a negative impact on the population size of that species, Fact2: Some species of amoeba are harmful parasites., Question: what can negatively impact a species? (A) chemicals (B) elephant (C) cells (D) dog (E) drought (F) mines (G) steroids (H) amoeba
A:
H