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:
Northern countries have extensive erosion due to (A) glacial liquification (B) cola mining (C) more frequent tornadoes (D) meteors

Ex Output:
A


Ex Input:
Which has molecules? (A) a Popsicle (B) suicide (C) therapy (D) thoughts

Ex Output:
A


Ex Input:
Soil could be Earth's what? (A) dermis (B) Buddy (C) Magic (D) Tears

Ex Output:

A