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 are a source of fibers? (A) water (B) plantlife (C) rocks (D) air

Ex Output:
B

Ex Input:
migration is when animals travel from the northern most state to Texas during what segment of time? (A) lake fronts (B) birds (C) winter (D) spring

Ex Output:
C

Ex Input:
What is present during the day but not at night? (A) the moon (B) sunlight (C) clouds (D) planets

Ex Output:
B