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:
This animal thrives while the sun is down (A) the bull shark (B) the snowy owl (C) the prairie dog (D) the spotted giraffe

Ex Output:
B


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:
Meadow voles consume (A) producers (B) apex predators (C) decomposers (D) detritivores

Ex Output:

A