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:
harming an animal species causes that animal 's population to do what? (A) explode (B) rise (C) plummet (D) burst

Ex Output:
C


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:
Above 100 degrees Celsius a kind of water is what? (A) vapor particles (B) solid (C) ice (D) frigid

Ex Output:

A