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: a breathing mask is used for keeping harmful particles from entering the respiratory system, Fact2: Oxygen enters the respiratory system through the mouth and the nose., Question: Breathing masks are used to keep harmful particles from entering the mouth and the what? (A) body (B) eyes (C) air (D) skin (E) gullet (F) nose (G) ears (H) lungs
[EX A]: F

[EX Q]: Fact1: having food has a positive impact on an organism 's health, Fact2: Birds and animals eat such food ., Question: What generally has a positive impact on an organism's health? (A) stay warm (B) sex with multiple partners (C) smoking (D) exercise (E) nutrients (F) eating (G) Cooking (H) fasting
[EX A]: F

[EX Q]: Fact1: a speedometer is used for giving a driver feedback on the speed of their vehicle, Fact2: Trucks and cars are vehicles., Question: what is a speedometer used by for giving a driver feedback on speed? (A) 86400 (B) lynx (C) as a base (D) lamphreys (E) humans (F) weater (G) trucks (H) Type O
[EX A]:
G