Read this US policy on clean water.The Clean Water Act (CWA) establishes the basic structure for regulating discharges of pollutants into the waters of the United States and regulating quality standards for surface water. – "Summary of the Clean Water Act,” Environmental Protection Agency
Answer
A
to report the number of cases of people who have cholera symptoms
B
to provide health guidelines about effects from waterborne diseases
C
to enforce standards that focus on chemical discharge into bodies of water
D
to carry out research that investigates how dirty water affects human health
Explanation
The Clean Water Act regulates pollutant discharges into U.S. waters and sets standards for surface-water quality. This matches choice C, which describes enforcing standards focused on pollution discharged into bodies of water. The other choices describe disease reporting, health guidance, or research, which are not the policy’s main purpose.
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