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: speed is a measure of how fast all these move but (A) a person waiting (B) a fish swimming (C) a dog running (D) a bird flying

Output: A


Input: Consider Input: Coal and oil directly removed from the ground are (A) directly consumed (B) thrown away (C) made into products (D) stored underground

Output: C


Input: Consider Input: Soil is produced naturally when, over a period of many years (A) stones are rock solid (B) stones are blown up (C) stones are vaporized by storms (D) stones are worn down


Output: D