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

Ex Output:
B


Ex Input:
A learned behavior is exhibited when (A) squinting in bright light (B) nailing up a picture frame (C) blinking and gulping air (D) inhaling and exhaling during sleep

Ex Output:
B


Ex Input:
A dry bush may burst into flames due to (A) raining skies (B) wetter air (C) higher temps (D) faster birds

Ex Output:

C