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").

Input: Consider Input: heat and pressure change the remains of what into natural gas? (A) leaves (B) cans (C) books (D) cars

Output: A


Input: Consider Input: Grooves in the ground are a sign of (A) sink holes (B) erosion (C) water accumulation (D) high traffic

Output: B


Input: Consider Input: Which of these animals might eat a steak? (A) Chicken (B) Lion (C) Cow (D) Buffalo


Output: B