What did Rome require of allies?

The socii (allies), bound to Rome by treaty, ordinarily did not then have the rights of Roman citizens, yet they were bound to do military service and to pay taxes or tribute, depending on the treaty's terms

in 550 b.c.e. cyrus the great, the leader of the persians, conquered the medes and united the iranian people under one ruler for the first time. cyrus became the first king of the persian empire and went on to establish one of the largest empires in world.

the real answer is b