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: 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
[A]: F

[Q]: Fact1: an incandescent light bulb converts electricity into light by sending electricity through a filament, Fact2: Electrical energy is also energy., Question: What part of a light bulb has energy run through it, converting energy into light? (A) adding heat (B) sun's heat (C) cotton (D) heat energy (E) glass (F) light (G) filaments (H) broken light bulbs
[A]: G

[Q]: Fact1: Most carcinogens cause cancer by producing mutations in DNA., Fact2: Lung cancer is the deadliest of all cancers., Question: what cause production of mutations in DNA of areas such as lungs (A) Damages them (B) the environment (C) carcinogens (D) cigarettes (E) rays or beams (F) smoking tobacco (G) smoking (H) Pollution
[A]:
C