Because it encouraged later revolutions in other parts of the world. :)
So they have something to rely on
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By 380 CE, Christianity was the official religion of D. the Roman empire.
<h3>What is Christianity?</h3>
It should be noted that Christianity are the followers of Christ and those who practice the religion.
In this case, by 380 CE, Christianity was the official religion of the Roman empire.
In conclusion, the correct option is D.
Learn more about Christianity on:
brainly.com/question/855630
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I looked it up and it seems that the best best answer would be RISE AND FALL OF DYNASTIES.