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").

Example Input: The way that the earth rotates and moves through space can effect how (A) the stars are viewed in the sky (B) how the moon phases (C) the heat of the sun (D) the plants we are able to eat
Example Output: A

Example Input: A boy is waiting to see a full moon. He notes that the full moon is tonight, and looks at it. If he wants to see another, he must wait (A) a week (B) a day (C) a fortnight (D) a month
Example Output: D

Example Input: If a thing creates sugars in a natural system, then it is likely a (A) daffodil (B) wolf (C) rabbit (D) deer
Example Output:
A