Which of the Following Is True of the Safe Drinking

Which of the following is true of the Safe Drinking Water Act?

A) A public water system is defined to include any supplier of water to the public that has 30 or more service connections or serves 250 people or more at least 180 days a year.
B) The standards must be met by "public water systems" and apply at the point the drinking water enters the water distribution system.
C) The standards are not applicable to private water suppliers that provide water to their citizens.
D) While states are required to enforce the drinking water standards, the federal government does not have the right to enforce them.