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:
A person yells inside a garage. Their voice echoes and they hear (A) a bird chirping away (B) a dog barking loudly (C) a car engine rev (D) a shout repeating softer

Ex Output:
D


Ex Input:
A source of heat may come from (A) a cold shower (B) holding hands (C) holding ice (D) Antartica

Ex Output:
B


Ex Input:
when the needle of a compass lines up with Earth 's magnetic poles , the needle is (A) pointing east (B) pointing west (C) pointing at arctic (D) pointing to space

Ex Output:

C