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 can be used to pass information from one person to another? (A) an invention by Marconi (B) an invention by Newton (C) an invention by McCormick (D) an invention by Pasteur

Ex Output:
A

Ex Input:
Locusts historically always affect crops (A) in the sky (B) disadvantageously (C) near water (D) positively

Ex Output:
B

Ex Input:
A person makes dresses and everyone in a location buys them. Once everyone has bought a dress, the dress sales (A) boom (B) grow (C) cease (D) increase

Ex Output:
C