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:
The circulatory system brings oxygen to the body from where? (A) The chest (B) The brain (C) The feet (D) The stomach

Ex Output:
A


Ex Input:
A rainbow is caused by rain and what? (A) grass (B) winds (C) solar rays (D) oceans

Ex Output:

C