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: Oil platforms originating from a number of oceanic placements can be related to an unintentional release of what? (A) oil pumps (B) nuclear fission (C) biological created fuel (D) solar energy

Output: C

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: The outer casing of a tree expands how many times a year (A) 1000 times (B) ten times (C) once (D) 100 times
Output: C