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 of the following most likely led to certain rocks having less friction? (A) a babbling brook (B) people (C) a light wind (D) money

Ex Output:
A

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:
To witness physical change you would need to observe the life cycle of a (A) chicken (B) monkey (C) alligator (D) newt

Ex Output:
D