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: If you had a hammer, you would find ____ nails made of ____ (A) wood; wood (B) iron; wood (C) wood; iron (D) iron; iron
Example Output: D

Example Input: In the food chain process what has the role of producer? (A) eaters (B) flora (C) carnivore (D) consumers
Example Output: B

Example Input: Which animal lacks the ability to see by sensing light? (A) Southern cave crayfish (B) lobster (C) cod (D) salmon
Example Output:
A