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 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:
The energy that is stored in food originally comes from  
 (A) air (B) soil (C) sunlight (D) water
answer:
C


question:
Two of Earth's plates pushed together, and the ground moved. What happened?  
 (A) an earthquake (B) a landslide (C) a volcano (D) an avalanche
answer:

A