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:
Riding a two wheeled human powered vehicle is good for the environment because (A) it runs without fuel (B) it helps people stay in shape (C) they are cheaper to maintain (D) they are more fun to drive

Ex Output:
A


Ex Input:
Coal and oil directly removed from the ground are (A) directly consumed (B) thrown away (C) made into products (D) stored underground

Ex Output:
C


Ex Input:
What decreases in an environment as the amount of rain increases? (A) solar light (B) water (C) rivers (D) hydration

Ex Output:

A