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:
2000 years ago, this method would likely have brought sand from the coast to the desert (A) the pyramids often eroded, making their own sand (B) constant breezes over time (C) human automobiles transfer materials (D) the space shuttle moved sand great distances

Ex Output:
B


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

Ex Output:
B


Ex Input:
What will be more available in an area when rain is common? (A) dirt (B) air (C) h2o (D) fire

Ex Output:

C