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: a battery converts chemical energy into electrical energy, Fact2: Check the fire alarm's batteries the first of each month., Question: What converts chemical energy into electrical energy? (A) Something in a fire alarm (B) sperm and egg fuse (C) Males and females (D) igniting fuel and oxidiser (E) The bending of a ray of light (F) basic building blocks of life (G) sensory neurons (H) mechanical waves

Ex Output:
A


Ex Input:
Fact1: a light bulb is used for seeing in the dark, Fact2: Light is emitted by a light bulb., Question: What is required for seeing? (A) dark (B) sun (C) light (D) wind (E) retina (F) eyes (G) photons (H) copper

Ex Output:
C


Ex Input:
Fact1: Fish have a circulatory system with a two-chambered heart., Fact2: Each side of the heart is divided up into two chambers., Question: ish have a circulatory system with what? (A) our nearest star (B) divided heart (C) solid, liquid, gas (D) Veins and arteries. (E) kinetic energy (F) flow of electrons (G) reducing acid rain (H) matter vibrating

Ex Output:

B