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").

Input: Consider Input: A thing which moves very little over quite a lot of time is a (A) pack of wolves (B) racing horses (C) falling rocks (D) giant ice brick

Output: D


Input: Consider Input: Why is it fall one month and spring another month? (A) the moon has different phases (B) the earth is revolving (C) solar flares appear in cycles (D) the earth is in a different place in its orbit

Output: D


Input: Consider Input: A new moon can be observed every (A) 1 month (B) 1 week (C) 1 day (D) 1 year.


Output: A