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 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

Ex Output:
D

Ex Input:
Fact1: Plants that shed their leaves seasonally each year are called deciduous plants., Fact2: Vines are perennial, deciduous climbing plants., Question: What sheds their leaves seasonally each year? (A) camels (B) oak (C) Spruce (D) fens (E) Trees (F) burrs (G) apples (H) vines

Ex Output:
H

Ex Input:
Fact1: microscope is used to see small things by biologists by making them appear bigger, Fact2: Bacteria are very small., Question: What do biologists use microscopes for? (A) rays or beams (B) Deoxyribonucleicacid (C) to listen for bacteria (D) An object is seen (E) mutations (F) to record data (G) to see quarks (H) to see bacteria

Ex Output:
H