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: Amphibians undergo changes in structure of being in that (A) salamanders can regrow their tails (B) salamanders can lose their tails (C) frogs can breathe air and water (D) they begin as a different looking being

Output: D


Input: Consider Input: Which sustains life yet stopped growing? (A) air (B) a bush (C) a rock (D) a felled tree

Output: D


Input: Consider Input: Small, usually red plastic squares are often placed on transporters such as bicycles in order to (A) create light (B) show color (C) identify drivers (D) shine light


Output: D