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:
People can touch something to see if it's (A) shiny (B) red (C) striped (D) wrinkled

Ex Output:
D


Ex Input:
A person puts a potato in some embers on the edge of a campfire and the potato gets hot. The embers are (A) good for food (B) a cool source (C) meant to sleep (D) a exothermic reaction

Ex Output:

D