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: if a thermal conductor is exposed to a source of heat then that conductor may become hot, Fact2: Copper is a great thermal conductor., Question: What becomes hot when exposed to a source of heat? (A) rubber (B) wool (C) an object (D) copper (E) paper (F) sugar (G) the skin (H) our star

Ex Output:
D


Ex Input:
Fact1: rain causes erosion, Fact2: Erosion of dunes leads to erosion of the beach and of the Island., Question: What can destroy dunes? (A) wind (B) fire (C) turtles (D) storms (E) clams (F) heat (G) rain (H) grain

Ex Output:
G


Ex Input:
Fact1: Viruses are so small that they can be seen only with an electron microscope., Fact2: Viruses include the Tobacco Mosaic Virus., Question: How can cells of the Tobacco Mosaic be seen? (A) refraction of light (B) an area swollen with pus (C) by indirect light (D) death and devastation (E) bending light rays (F) electron microscope (G) deadly and devastating (H) Veins and arteries.

Ex Output:

F