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").

Input: Consider 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

Output: A


Input: Consider Input: Animals may relocate to a new environment if their old environment (A) experienced a large hurricane (B) experienced a serious thunderstorm (C) had a few arid days (D) had little rainfall for a week

Output: A


Input: Consider Input: Birds are a vehicle for spreading the seeds of what? (A) winds (B) dissent (C) flame (D) oaks


Output: D