Answer:
The answer is Cup 9
Explanation:
It can’t be 4 because 4 is closed off so it won’t be filled but if it was open the answer would be Cup 4.
It can’t be 5 or 7 because the pipe that goes to 5 and 7 is higher than the one that goes to 9 and 4 and it also has to fill up to their points.
The answer is 9 because it is the only one that will be filled before the rest of the cups will be filled.
Hopefully this helps you
pls mark brainlest
