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: cold fronts cause thunderstorms as they pass by, Fact2: If cold air replaces warm air, it is called a cold front., Question: What does cold air replacing warm air cause? (A) Greenhouse gases (B) Pollution (C) Dehydration (D) thunderstorms (E) steady barometer readings (F) hypothyroidism (G) constant air pressure (H) stagnant air temperature

Output: D


Input: Consider Input: Fact1: if all members of a species cannot produce offspring then that species will likely become extinct, Fact2: Avian species are less likely to become extinct if they are common across large ranges., Question: Avian species are less likely to end up extinct if they what? (A) single-celled organisms (B) important habitats (C) abandon habitats (D) stop reproducing (E) animals with backbones (F) produce offspring (G) population movement (H) destroy offspring

Output: F


Input: Consider Input: Fact1: sonar is used to find the location of an object, Fact2: Sonar bounces sound waves off the bottom of the ocean., Question: What can be bounced off the ocean floor to located objects? (A) soundwaves (B) rubber balls (C) submarines (D) whale bones (E) electricity (F) rays or beams (G) light (H) satellites


Output: A