Plz sove and send

Dear student,
Please find below the answer:

The correct option is (C).
The water that we drink could come from some other country through clouds and rainfall and we do not have any control over it. It can come through rivers. Different countries sign treaties regarding the rivers that flow from their country and also from some other country. So, a river does not strictly provide water to only one country. If it flows through two countries, it will provide water to both.

So, both Shuchi and Nisha are correct.

Hope this clears your doubt.
Regards.