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: Protozoa make humans sick when they become human parasites., Fact2: Exhibit One-celled animals are called protozoa ., Question: what can make humans sick when they become parasites? (A) h2o (B) tissue made of chondrocytes (C) antibodies (D) Therapsids (E) one-celled animals (F) gravity (G) uncontrollable burning (H) digestion
A:
E