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: Living things are classified as producers or consumers according to  
 (A) their speed of movement (B) the size of their communities (C) how they obtain food (D) how they reproduce

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: Cumulonimbus clouds often form along cold fronts. Which type of weather is most likely to occur along a cold front?  
 (A) moderate temperature with mild breezes (B) storms with hurricane winds (C) rain with possible severe thunderstorms (D) high temperatures with low winds

Answer:
C