We can infer from the passage that ______ .

We can infer from the passage that ______ .
A、both countries are facing the challenge of how to balance the uses of the waterfalls
B、both countries are arguing about how to manage the waterfalls
C、both countries are challenging each other about how to use the waterfalls
D、both countries are trying to steward the waterfalls
【正确答案】：A