Answer: Hello there! I'm kind of stuck between two options, but I'd say that the answer to this question is A.
Explanation:
A sounds like the most reasonable answer to me. In his lifetime, Cyrus civialized a large area of Rome and was deemed as great by the people.
The other answers didn't speak to me as much here...
B--He did tolerate a lot of religions, but I'm not sure about ALL of them.
C--I don't believe that Cyrus had any slavery involved in his conquers; in fact, I've heard people call him more gentle than anything.
D--I don't think he fought in this battle. I believe that it would've been the Persian king Xerxes I.
I'm sorry that I can't give a definete answer. I hope that this helps you somehow, though! :)