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: if gas is heated then that gas will expand, Fact2: An increase in temperature causes a gas to expand., Question: what affects a gas? (A) electricity (B) kinetic energy (C) temperature (D) Evaporation (E) salinity (F) Pollution (G) wind (H) magnetism
[EX A]: C

[EX Q]: 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
[EX A]: G

[EX Q]: Fact1: mountains are formed by earthquakes, Fact2: For mountains one goes to the Alps., Question: What was formed by earthquakes? (A) deposits (B) coarse grit (C) backbones (D) road bends (E) The Alps (F) pitches (G) waves (H) Otoacoustic
[EX A]:
E