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: 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
Example Output: B

Example Input: Greenhouses are great for plants like (A) Pizza (B) Lollipops (C) Candles (D) French beans
Example Output: D

Example Input: what does lighting it cause a candle? (A) it stays same (B) none of these (C) it gets shorter (D) it gets taller
Example Output:
C