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: Which of the following can be found on the moon? (A) Non-volcanic Mountains (B) Life-filled Oceans (C) Volcanic Mountains (D) Multiple Land Masses
Example Output: A

Example Input: An echo is produced by what type of reflection of sound source? (A) Direct (B) Distant (C) Varied (D) Single
Example Output: D

Example Input: Hot tea works better than cold for dissolving (A) lemons (B) ice (C) nuts (D) rocks
Example Output:
B