Definition: 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.
Input: What happens to the path of a light ray as it passes from air into water at an angle?
(A) Its path widens. (B) Its path bends. (C) Its path becomes shorter. (D) Its path continues in a straight line.
Output:
B