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").

[EX Q]: Fact1: Loss of ozone has created an ozone hole over Antarctica., Fact2: Antarctica's ozone layer is threatened by depletion., Question: What can loss of ozone lead to? (A) irritants (B) bad weather (C) Car accidents (D) ozone hole (E) rain (F) A hurricane (G) stormy weather (H) destroyed crops
[EX A]: D

[EX Q]: Fact1: Prokaryotes are single-celled organisms that lack a nucleus., Fact2: Prokaryotes are usually microscopic and bacteria is an example of a prokaryote., Question: What are single celled organisms that do not have a nucleus? (A) Most plants (B) nucleus (C) ferns (D) fossil fuels (E) bushes (F) Eukaryotes (G) leech (H) bacteria
[EX A]: H

[EX Q]: Fact1: coal is used for generating heat by burning, Fact2: Coal forms from dead plants, compacted., Question: What is used for generating heat by burning? (A) compacted dead plants (B) basic building blocks of life (C) deoxyribonucleic acid (D) igniting fuel and oxidiser (E) hard plastics (F) soft styrofoam (G) Sulfur dioxide (H) thin metal sheets
[EX A]:
A