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: condensing means changing from a gas into a liquid by reducing heat energy, Fact2: Heat energy is measured in calories., Question: Calories measure the energy that leaves a gas to form what? (A) nutrients (B) burning (C) warmth (D) H20 (E) ligt (F) liquid (G) store (H) movement
[A]: F


[Q]: Fact1: skin is used for protecting the body from harmful substances, Fact2: Skin is the body's largest organ., Question: What can protect the body from harmful substances? (A) the body's largest organ (B) layers of fat (C) Electric devices (D) bones (E) sunburns (F) hard outer covering (G) deoxyribonucleic acid (H) muscle
[A]: A


[Q]: Fact1: Mating is generally preceded by courtship., Fact2: Flirting, the first step in the courtship ritual, is essential to modern relationships., Question: what is generally preceded by flirting in a modern relationship? (A) PDAs (B) ligt (C) Decibels (D) firm hugs (E) friction (F) heat (G) autumn (H) mating
[A]:
H