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: a breathing mask is used for keeping harmful particles from entering the respiratory system, Fact2: Pulmonologists treat lungs and respiratory systems., Question: what does a breathing mask keep harmful particles from entering? (A) skin (B) tissue (C) stomach (D) h2o (E) H20 (F) air (G) lungs (H) gas masks

Answer: G


Question: Fact1: Some arthropods have special excretory structures., Fact2: All insects are arthropods., Question: what sometimes has special excretory structures? (A) insects (B) bees (C) a fish (D) barnacles (E) animals (F) carbon (G) feces (H) humans

Answer: A


Question: Fact1: skin is used for protecting the body from harmful substances, Fact2: Skin is a protective organ., Question: What does skin help keep out? (A) medicine (B) sun's heat (C) heat (D) hurtful words (E) a pathogens (F) parasites (G) harmful substances (H) Echinoderm.

Answer:
G