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: Unlike trees in the forest or a pond full of fish, metal is only available until (A) it is depleted for good (B) it is found on catfish scales (C) it becomes necessary to conduct electricity long distances (D) it is used to make diamond rings

Output: A


Input: Consider Input: Standing on a plastic tote will (A) vaporize it (B) deform it (C) levitate it (D) melt it

Output: B


Input: Consider Input: Two felled trees, split in twain, with the same number of rings, means they're the same (A) emotionally (B) crab (C) type of tree (D) age


Output: D