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: A plant's roots break down rocks as the roots do what? (A) decay (B) grow old (C) develop (D) dcerease
Example Output: C

Example Input: Even items such as rocks mass can be changed due to which process? (A) Weathering (B) Climate (C) Weatherization (D) Weather
Example Output: A

Example Input: An amphibian has what temperature blood? (A) toasty (B) chilly (C) hot (D) burning
Example Output:
B