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.
D. This is because he is considered part of the early romantic era and is often referred to as a bridge into the romantic era