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:
Which of the following is correct? (A) The earth's strong gravitational pull causes a waxing gibbous to form (B) astrology causes a waxing gibbous to form (C) star maps cause a waxing gibbous to form (D) government satellites cause a waxing gibbous to form

Ex Output:
A


Ex Input:
An action that may provide a small bit of warmth could be (A) looking out of a window (B) putting the radio on (C) looking at a snow storm (D) smashing hands together repeatedly

Ex Output:
D


Ex Input:
By plugging in the cord you can supply power to (A) a garden gnome (B) a rock (C) the sun (D) a hairdryer

Ex Output:

D