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:
Which is the least massive? (A) the Earth (B) the moon (C) the sun (D) the solar system

Ex Output:
B


Ex Input:
migration is when what move to different locations in an annual cycle? (A) animal figurines (B) sedentary animals (C) habitual creatures (D) currents

Ex Output:
C


Ex Input:
As water increases in an environment the number of aquatic animals such as zooplankton, nekton, and benthos will (A) on the up (B) fall (C) stagnate (D) face extinction

Ex Output:

A