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.
--------
Question: Historically, how has the compass been used?  
 (A) for navigation (B) to predict weather (C) to measure temperature (D) for mineral identification

Answer: A


Question: Which is the best example of evaporation?  
 (A) raindrops freezing (B) an ice cube melting (C) a puddle drying in the sun (D) a sponge soaking up water

Answer: C


Question: A scientist found fossils of ocean shells on a mountain top. Based on this find, which statement can be made?  
 (A) The climate was once colder. (B) The shells were carried by the wind. (C) The mountain was covered by water. (D) The shells once lived on dry land.

Answer:
C