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: A star produces light energy and heat because it has a variety of (A) moon rotation causing friction (B) light energy flowing to earth (C) reactions of nuclear form (D) global warming caused by co2

Output: C


Input: Consider Input: What substance found in rocks shares it's name with an object which can take wrinkles from an item worn on the body to cover the skin from the elements? (A) Iron (B) Stove (C) Copper (D) Steamer

Output: A


Input: Consider Input: A salamander is (A) extinct (B) bipedal (C) cold blooded (D) warm blooded


Output: C