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").

Ex 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

Ex Output:
A

Ex Input:
Cows know there is salt in a mineral lick because (A) they have receptors on their tongue that allow them to experience spice and seasonings (B) a cow in the ocean told them it was there (C) it's on their side of the pasture's fence (D) they evolved where there were great redwood trees

Ex Output:
A

Ex Input:
A celestial body grows a few meters in size every year, and the mass increases as well. After a hundred years, the celestial body will (A) repel the sun (B) have stronger gravity (C) attract the sun (D) have weaker gravity

Ex Output:
B