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").

Example Input: Dirt is moved from one part of a forest to another, and travels across a field to get there. The movement is (A) caused by gusts (B) due to clouds (C) made by trees (D) because of litter
Example Output: A

Example Input: It is possible to renew (A) sunflowers (B) oil (C) steel (D) stones
Example Output: A

Example Input: Which object would have more tightly packed matter (A) gold (B) gas (C) wood (D) water
Example Output:
A