Answer:
C
Explanation:
Intergovernmental organizations like WTO, UN, AU and so on, are organizations established by the different states or nations bounded by treaties, while non-governmental organizations are created by private individuals or organizations in a state or internationally, with ye sole aim of providing welfare and development of the people and the environment.
Form the listed situation given, the one which a non-governmental organization can best address within their purview and jurisdiction is "C".
Since the pollution of water supply by the powerful country doesn't violate established international treaties, intergovernmental organizations might not act to address the issue. However, a non-governmental organization cam step in to address the issue to save the environment from further pollution.
