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: If one mineral can scratch another mineral then that other mineral is softer than that one mineral, as can be tested with (A) a diamond and steel (B) a rock and glass (C) a diamond and agate (D) a ruby and salt

Output: C


Input: Consider Input: If a fish lives in water that is very dark, the fish may calibrate its body over time to (A) absorb helium (B) turn invisible (C) eat more (D) be blind

Output: D


Input: Consider Input: Winter snows follow Autumn's falling leaves by (A) three months (B) three days (C) three years (D) 12 months


Output: A