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: Humans contribute to environmental pollution (A) by purchasing products made from recycled products (B) by switching to energy efficient appliances (C) by leaving behind refuse on public beaches (D) by frequently recycling paper and plastic
Example Output: C

Example Input: What could be used as an electrical conductor (A) A penny (B) Shoe laces (C) Wood (D) A button
Example Output: A

Example Input: Lava is found above the ground because when there is lava there is (A) a soft song (B) a frontal lobe (C) a small indent (D) a movement happening
Example Output:
D