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:
Magnetic media, such as TVs, computer monitors, credit cards and pacemakers can be damaged when exposed to (A) neodymium (B) a paper clip (C) copper penny (D) metal nails

Ex Output:
A


Ex Input:
an example of converting potential energy to kinetic energy is (A) a resting bird (B) a still rock (C) our own sun (D) cars spinning tires

Ex Output:
D


Ex Input:
Splitting and fusing billions of atoms at the same location in space produces (A) darkness (B) frigged rain (C) illumination (D) groceries

Ex Output:

C