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:
a student leaves a nail line on a mineral sample, so that mineral can be described as what? (A) a mineral (B) a soft mineral (C) a liquid mineral (D) a mineral melt

Ex Output:
B


Ex Input:
Asking a blind person to look at something is rude because they are (A) unable to speak (B) unable to eat (C) unable to see (D) unable to live

Ex Output:
C


Ex Input:
if a river ran through a region, what would be found close by? (A) land mass susceptible to water encroachment (B) active life coral reef (C) acid rain susceptible area (D) very active volcanic mountains

Ex Output:

A