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: Mollusks reproduce sexually., Fact2: Mollusks are the dominant invertebrate., Question: what reproduces sexually? (A) A compound that donates proton (B) spread flower seeds (C) They have webbed feet (D) Plant reproduction (E) By wind and rain (F) passenger pigeons (G) the dominant invertebrate (H) Something found in San Francisco
[A]: G

[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
[A]: F

[Q]: Fact1: touch can be used for detecting texture, Fact2: Nerve endings in the dermis are the source of the body's sense of touch., Question: Nerve endings in what part of the body can be used for detecting texture? (A) humans (B) small (C) the dermis (D) femur (E) follicles (F) animals (G) clavicle (H) some mammals
[A]:
C