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: Sodium, Na, is in the same group as  
 (A) Ne. (B) Mg. (C) Ca. (D) K.
Example Output: D

Example Input: An Earth Science class is planning a field trip to a quarry to look for fossils. Which item will be important for the students to wear during the field trip to prevent damage from solar radiation?  
 (A) disinfectant (B) suntan lotion (C) safety goggles (D) ear protectors
Example Output: B

Example Input: Which is the best evidence that rocks found deep underground were once exposed at the surface?  
 (A) The rocks have been melted by a magma. (B) The rocks have been broken by faults. (C) The rocks have been weathered by water. (D) The rocks have been folded by pressure.
Example Output:
C