You are given a science question (hard-level) and four answer options (associated with "A", "B", "C", "D"). Your task is to find the correct answer based on scientific facts, knowledge, and reasoning. Do not generate anything else apart from one of the following characters: 'A', 'B, 'C', 'D'. There is only one correct answer for each question.

Input: Consider Input: A car tire runs over a can and crushes it completely. Which statement is true for the atoms of the structure of the can?  
 (A) The atoms are broken. (B) The atoms are flattened. (C) The atoms remain the same. (D) The atoms are changed into different atoms.

Output: C


Input: Consider Input: A gene mutates in a type of bacteria. When these bacteria reproduce asexually, this mutation can only be inherited by  
 (A) different types of bacteria. (B) cells in the bacteria that are non-reproductive. (C) bacteria cells that are missing the gene. (D) direct descendants of the bacteria.

Output: D


Input: Consider Input: Which of the following is a central role of carbon in the chemistry of living organisms?  
 (A) Carbon can only bond with other carbon atoms. (B) Carbon is a solvent that breaks chemical bonds. (C) Carbon readily forms ionic bonds that separate easily. (D) Carbon can form many types of molecules with covalent bonds.


Output: D