Final answer:
The London Convention on the Prevention of Marine Pollution is an international treaty and thus is the correct answer as it is not a law exclusive to the United States. Other options listed are U.S. federal laws aimed at preventing water pollution. So the correct option is D.
Step-by-step explanation:
The subject question asks which among the provided options is not a law applicable solely in the United States. The correct answer is the D. London Convention on the Prevention of Marine Pollution. This is because the London Convention is an international agreement aimed at preventing marine pollution from ships and other sources, and applies to multiple countries that have ratified it. The other options, namely the Clean Water Act, the Safe Drinking Water Act, and the Marine Protection, Research, and Sanctuaries Act, are all U.S. federal laws designed to preserve water quality and prevent water pollution within the United States. These laws set various regulations and standards to control water pollutants and aim to ensure that water remains safe and clean for public use and environmental protection.