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 lists the diameter of the planets in order from smallest to largest?
(A) Venus, Earth, Mercury, Mars (B) Earth, Mars, Venus, Mercury (C) Mars, Mercury, Earth, Venus (D) Mercury, Mars, Venus, Earth
[A]: D

[Q]: When a person speaks, the type of wave produced can be described as all these except
(A) transverse. (B) mechanical. (C) compression. (D) longitudinal.
[A]: A

[Q]: Energy is transferred in an electrical circuit through
(A) static protons. (B) moving protons. (C) static electrons. (D) moving electrons.
[A]:
D