The choices can be found elsewhere and as follows:
<span>de Mendez has been an old enemy
de Mendez quarantines Gulliver from the sailors
</span>
I believe the answer is the first one. Gulliver is not able to respond to pedro de mendez's help because de Mendez has been an old enemy.
A circle?? I am not sure. Sorry if it is wrong
methods for the conservation and management of water
The classical music was popular music at the time. So I would go with that, nationalism, and immigration. Do not quote me on it though.