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: Infancy is the period of most rapid growth after birth., Fact2: During infancy, babies learn whether to trust the world., Question: Babies do what most during their rapid growth period? (A) birth (B) move (C) run (D) fight (E) puberty (F) play (G) learn (H) shaking
[EX A]: G

[EX 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
[EX A]: G

[EX Q]: Fact1: harming an animal species has a negative impact on the population size of that species, Fact2: Hot weather can cause harmful bacterial growth in feeders., Question: What can have a negative impact on a species' population size? (A) cigarettes (B) Pesticides (C) steroids (D) humans (E) weather (F) flooding (G) Smoking (H) viruses
[EX A]:
E