instruction:
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:
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:
Which of these will best separate a saltwater solution?  
 (A) using a paper filtering system (B) using chromatography (C) allowing the salt to settle (D) allowing the water to evaporate
answer:
D


question:
Animal cells perform functions using energy that is derived from glucose (C6H12O6). Which molecule is required for animal cells to obtain the most energy possible from a molecule of glucose?  
 (A) water (B) oxygen (C) lactic acid (D) carbon dioxide
answer:

B