decrease the temperature of the factory water increase the temperature of the river water remove the vegetation from the river add more fish to the river
I am hesitating between 4 options to answer the following question, which option should I choose?
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?
Possibilities:
- decrease the temperature of the factory water
- increase the temperature of the river water
- remove the vegetation from the river
- add more fish to the river

decrease the temperature of the factory water