Q: 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.
Water used in a factory is heated to 75 degrees Celsius. It is discharged into a nearby river that has a normal temperature of 20 degrees Celsius. Which should most likely be done to minimize damage to the river?
(A) decrease the temperature of the factory water (B) increase the temperature of the river water (C) remove the vegetation from the river (D) add more fish to the river
A:
A