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 tone is made when a hammer makes contact with (A) a waterfall (B) air (C) an solid object (D) a log
Example Output: C

Example Input: If a being is moving regularly, then that being is (A) hardly healthy (B) probably strong (C) about to die (D) making little motion
Example Output: B

Example Input: Animals require (A) the help of people (B) the environmental output of plants (C) the same gas needed for photosynthesis (D) a lack of natural resources
Example Output:
B