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 statements is true about the parts that make up the atom?
(A) Protons are larger than neutrons. (B) Electrons have a positive charge. (C) Electrons are inside the nucleus. (D) Neutrons have no charge.
A:
D