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:
If a tree in your backyard rots away for is knocked over by the wind, you can just (A) plant another (B) Draw one (C) climb one (D) do nothing

Ex Output:
A


Ex Input:
How can it be shown that an electrical conductor is a vehicle for the flow of electricity? (A) holding an electrified fence can kill you (B) electricity is unable to conduct well through rubber shoe soles (C) sticking a fork into an electrical outlet is safe if it is plastic (D) electricity is a volatile thing

Ex Output:
A


Ex Input:
Food digestion in humans can be aided by (A) microorganisms that have cell walls but lack organelles (B) hundreds of white blood cells (C) amoebas in the blood supply (D) carbon dioxide from the respiration process

Ex Output:

A