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: extreme heat and pressure change rock into metamorphic rock, Fact2: Marble is a form of metamorphic rock., Question: What is formed from extreme heat and pressure? (A) glass (B) marble (C) crust (D) soils (E) coal (F) sugar (G) calcite (H) arteries

Ex Output:
B


Ex Input:
Fact1: Food consists of organic molecules that store energy in their chemical bonds., Fact2: If an molecule contains carbon, it is called organic., Question: What does food consist of? (A) mostly carbon (B) solid, liquid, gas (C) mostly arsenic (D) mostly hydrogen (E) Energy. (F) mostly nitrogen (G) glucose (H) Most plants

Ex Output:
A


Ex Input:
Fact1: fog is formed by water vapor condensing in the air, Fact2: When air cools, the water vapor in the air condenses.", Question: Fog is formed when (A) summer end (B) evaporation (C) Winter (D) movement (E) air cools (F) Wet weather (G) rainy (H) dry and hot

Ex Output:

E