Can you ID 3 events or trends that signaled the oncoming Holocaust? PLEASE ANSWER THE QUESTION DON'T DELETE!!!

where is the section with the question?

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.

i actually think that the correct answer is: the roman senate power's could not exercise complete control over the common people or plebeians.

.hope that . and can i get brainest point