TASK DEFINITION: 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.
PROBLEM: 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

SOLUTION: C

PROBLEM: In order to maintain good health, humans should  
 (A) eat foods high in fat (B) exercise regularly (C) drink alcohol often (D) smoke tobacco occasionally

SOLUTION: B

PROBLEM: Plants store energy in what form?  
 (A) heat (B) light (C) chemical (D) mechanical

SOLUTION:
C