You are given a science question (easy-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: In what type of rock would a geologist most likely find evidence of ancient life?  
 (A) sedimentary (B) foliated (C) metamorphic (D) volcanic
Example Output: A

Example Input: Which process in the water cycle returns water from the surface of Earth to the atmosphere?  
 (A) condensation (B) evaporation (C) precipitation (D) runoff
Example Output: B

Example Input: Why would explorers use a compass when traveling to unknown lands?  
 (A) to locate a direction to travel (B) to measure the quality of drinking water (C) to protect themselves from wild animals (D) to determine levels of humanity in tropical areas
Example Output:
A