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: Why was my son-in-law required to add rugs or carpeting to his upstairs apartment when the ground floor wasn't? (A) So it would look good then prospective renters took a tour (B) Because they didn't want him to scratch up the wood floors. (C) Because they didn't want the downstairs renters to be as likely to complain about noise (D) Because they didn't want to pay for carpeting themselves.
Example Output: C

Example Input: Disposition is the process of forming what? (A) Crystals (B) Rocks (C) Salactites (D) Gemstones
Example Output: C

Example Input: What action has a positive impact on the conservation of nonrenewable resources? (A) depositing the nonrenewable resources in a landfill (B) waste as much of the resources as possible (C) start a large bonfire with resources (D) turn the nonrenewable into something newly usable
Example Output:
D