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.

[EX Q]: A boy pulls a sweater off over his head. His hair is attracted to the sweater due to
(A) a magnetic force (B) a heat transfer (C) a chemical change (D) an electrical charge
[EX A]: D

[EX Q]: The most significant human-induced impact on Earth's atmosphere comes from the use of which energy resource?
(A) flowing water (B) fossil fuels (C) sunlight (D) winds
[EX A]: B

[EX Q]: An automobile engine transforms chemical energy of fuel primarily into
(A) electrical energy and light energy. (B) electrical energy and mechanical energy. (C) thermal energy and light energy. (D) thermal energy and mechanical energy.
[EX A]:
D