Definition: You are given a science question (hard-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: A farmer thinks that the vegetables on her farm are not getting enough water. Her son suggests that they use water from the nearby ocean to water the vegetables. Is this a good idea?
(A) Yes, because there is plenty of ocean water. (B) Yes, because ocean water has many natural fertilizers. (C) No, because ocean water is too salty for plants grown on land. (D) No, because ocean water is much more polluted than rainwater.
Output:
C