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: 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

Answer: A

Question: What is an environmental threat posed by oil and gas acquisition and transport that is not posed by the acquisition and transport of the energy resources uranium, and wood?
(A) habitat change (B) vehicle pollution (C) pipeline leaks (D) soil compaction and loss

Answer: C

Question: A student performs a lab investigation by measuring the average time it takes for a toy car to travel 10 meters. Why is it best to perform the experiment in three trials?
(A) to form a good hypothesis (B) to increase the accuracy of the results (C) to make the results more significant (D) to better explain the investigation to others

Answer:
B