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: Disposition is the process of forming what? (A) Crystals (B) Rocks (C) Salactites (D) Gemstones

Output: C


Input: Consider Input: I use a knife to chip away at what to make a sculpture (A) A slab of rock (B) A bucket of sand (C) A glass of water (D) A bag of air


Output: A