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:
Sunlight is a source of (A) wind energy (B) warmth (C) frigid temperatures (D) moonlight

Ex Output:
B


Ex Input:
Which of the following would you use to most efficiently transport heat? (A) empty water bottle (B) cotton T-Shirt (C) baseball cap (D) empty soda can

Ex Output:
D


Ex Input:
whether hot or cold blooded, to survive all animals are required to (A) store radiant heat (B) wash with water (C) bath in sunshine (D) fight to survive

Ex Output:

A