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: Adding something poisonous to an environment and harming it is called what? (A) dirtying (B) liking (C) cleaning (D) observing
Example Output: A

Example Input: A person can get sick when eating a vegetable if it was farmed using (A) water (B) dirt (C) insect destroyers (D) tools
Example Output: C

Example Input: which of these apply to the values of matter vibration and sound given off? (A) both values are inversely proportional (B) both values have direct proportionality (C) both values are unrelated (D) none of these
Example Output:
B