In this task, you are given a multiple-choice question and you have to pick the correct option. Answer with option indexes (i.e., "A", "B", "C", and "D").

Ex Input:
An object converts electrical energy into sound on a (A) iphone (B) soft carpet (C) outside wall (D) wooden table

Ex Output:
A


Ex Input:
Which makes a sound when you interact with it? (A) something invented by Pasteur (B) something invented by van Leeuwenhoek (C) something invented by Sax (D) something invented by Galileo

Ex Output:
C


Ex Input:
Bacteria will build up on food if you leave it out, so if you make sure its protected from the air, you can (A) go to space (B) lift a bus (C) Fly (D) avoid falling ill

Ex Output:

D