Q: 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.
An earthquake in the Earth's crust under the ocean releases sound waves. Which statement accurately describes how the sound waves spread?
(A) They spread in all directions away from their source. (B) They remain trapped near the source by water pressure. (C) They travel mostly horizontally along the ocean floor. (D) They travel mostly upward toward the surface of the water.
A:
A