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").
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Question: Fact1: energy is used for heating a building by a heating system, Fact2: Faculty offices are also in the building., Question: What contains energy to raise the temperture of an office? (A) chemical messengers (B) peachleaf willow (C) deoxyribonucleic acid (D) cooling system (E) swimming pool (F) heating system (G) gym (H) organic molecules

Answer: F


Question: Fact1: All chemical reactions require activation energy to get started., Fact2: Chemical changes are a result of chemical reactions., Question: What is required before a chemical change? (A) kinetic energy (B) energy usage (C) activation push (D) activation energy (E) activation switch (F) activation power (G) Burning fuel and air (H) Evaporation

Answer: D


Question: Fact1: Viruses are so small that they can be seen only with an electron microscope., Fact2: Objects to be viewed are illuminated by electrons in an electron microscope., Question: What of the following can only be viewed by illuminating electrons?  (A) insects (B) small animals (C) eyelashes (D) Light (E) an image (F) fungi (G) viruses (H) an object

Answer:
G