The correct answer is religious persecution and here's why:
The Mongol rule occurred at the same time but was not as important as religious persecution. Muslim rule was common earlier during the 6th century, while intellectual oppression was not a recurring issue.
The answer is B spread it throughout an area
B, destroying the Roman Empire. Although the Greek Civilization was technologically advanced, destroying the Roman Empire was one of their biggest achievements.
2nd one because those were the areas with the best water to grow the planbts.
