A
Below is a question with multiple-choice answers. Choose the correct option based on your reasoning.

### 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?

### Choices:
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

### Answer:
