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: If a thing has a good impact on nature, it is most likely (A) putting plastics in special containers (B) burning old used tires (C) putting cigarettes out in ponds (D) using aerosol air fresheners
Example Output: A

Example Input: What displays the movement of electrons from the base atoms? (A) venus (B) mercury (C) plasma star (D) pluto
Example Output: C

Example Input: A person playing a song on a string instrument makes strings (A) mold (B) bawl (C) tear (D) shudder
Example Output:
D