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").

Input: Consider Input: Fact1: Migrants typically travel long distances., Fact2: Migrant birds arrive., Question: What travels long distances? (A) humans (B) jets (C) rocks (D) birds (E) camels (F) cocoons (G) Light (H) eggs

Output: D


Input: Consider Input: 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

Output: G


Input: Consider Input: Fact1: erosion causes a river to become deeper and wider, Fact2: Canyon formed as a consequence of river erosion., Question:  rivers cut deeper and wider to form what (A) canyons (B) arteries (C) Roads (D) timberlands (E) old growth forests (F) soils (G) Sediment (H) coral reefs


Output: A