Xerxes was king of

A. Athens.

B. Persia.

C. Delos.

D. Crete.

Your answer is B. Persia.

First king of Persia was Darius. When Darius died, his son which is Xerxes came to the Persian Throne.

The king of Athens was Pericles.

Delos was not really a popular story but in my, book, then didn't talk about the History of Delos.

And Crete is another part of Greece but it is below seperated a few far away. And this is kinda connected to Athens.

I am 100% sure!