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: Some arthropods have special excretory structures., Fact2: All insects are arthropods., Question: what sometimes has special excretory structures? (A) insects (B) bees (C) a fish (D) barnacles (E) animals (F) carbon (G) feces (H) humans

Ex Output:
A


Ex Input:
Fact1: the surface of a beach is formed by mechanical weathering, Fact2: Water is a mechanical weathering force., Question: what is the surface of a beach formed by? (A) a wave (B) gravity (C) water (D) plates (E) density (F) the sun (G) calcite (H) Rocks

Ex Output:

C