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: Caffeine is a central nervous system stimulant., Fact2: Cocaine is a stimulant and increases the user's heart rate and blood pressure., Question: What does caffeine do? (A) Increase fame (B) increases a body's strength (C) Release energy (D) Increase user's heart rate (E) Transfers energy (F) decrease stamina (G) Increase intelligence (H) Increase wealth

Ex Output:
D


Ex Input:
Fact1: Ants communicate with chemicals called pheromones., Fact2: Ants communicate with the colony in the form of what is called pheremon trails., Question: Ants communicate with the colony using what? (A) Electrical energy (B) Chemical energy (C) visible energy (D) Decibels (E) pheremon traits (F) heat energy (G) refraction of light (H) mechanical waves

Ex Output:
E


Ex Input:
Fact1: Many nucleotides bind together to form a chain called a polynucleotide., Fact2: Nucleotides are the building blocks of DNA ., Question: What do the building blocks of DNA bind together to form? (A) A compound that donates proton (B) colors of the spectrum (C) Electrical energy (D) chain called a polynucleotide (E) Something with exactly eight protons (F) Something that makes plants green (G) Something with a head, thorax, and abdomen (H) biological diversity

Ex Output:

D