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.

Q: Which of these tools is best for recording observations outdoors?  
 (A) a ruler (B) a graph (C) a notebook (D) a calculator

A: C
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Q: Marta studied different forms of energy. Which two types of energy travel in waves?  
 (A) light and sound (B) electrical and sound (C) chemical and light (D) chemical and electrical

A: A
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Q: A student wants to know which type of soil holds the most water. Which action should the student most likely do to answer the question?  
 (A) compare how the soils are alike (B) put the soils into different groups (C) record the weight of the soil (D) watch how quickly the soil drains

A:
D
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