Answer:
B. apply to all states
Explanation:
The clean water act was made in United States and states not to discharge the pollutants in the water bodies thereby protecting the water bodies from getting polluted. It also ensures to keep the water suitable for fishes and also swimming.
In this law, the federal government asks the state government to set rules for their people to discharge their waste products. However, in some states the enforcement of this law has declined over the years.
