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.

Example Input: Which land feature is most likely the result of a glacier?  
 (A) large, arid desert (B) deep, bowl-shaped lake (C) long crack in the ground (D) volcanic mountain range
Example Output: B

Example Input: What are the products in the reaction shown below? HCl + NaOH ->  
 (A) Na + Cl_{2} (B) NaCL + OH (C) NaOH + Cl (D) NaCl + H_{2}O
Example Output: D

Example Input: Use the information below to answer the question. Each organism on Earth is a part of a complex relationship with other organisms. This relationship is called a food web. The following organisms are part of a food web typically located in and around a reservoir. algae fish rabbit eagle pine tree grass field mouse Which member of the food web is a carnivore?  
 (A) field mouse (B) eagle (C) rabbit (D) algae
Example Output:
B